$93 Cheap Flights from Ontario

One-way

Departing from

Going to

Departing from

Ontario

Going to

anywhere

Santa Rosa (STS)

United States • May, 2026

100% AI deal score

$650 $137

Boise (BOI)

United States • May, 2026

91% AI deal score

$540 $155

San José del Cabo (SJD)

Mexico • March, 2026

86% AI deal score

$398 $93

San Salvador (SAL)

El Salvador • April, 2026

84% AI deal score

$405 $127

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Santa Rosa, United States

TOP

May • Direct

$325

$68

-$257

79%

Boise, United States

TOP

May • Direct

$270

$78

-$192

71%

Portland, United States

TOP

Mar • Direct

$215

$74

-$141

66%

Seattle, United States

TOP

Apr • Direct

$183

$77

-$106

58%

Denver, United States

TOP

Apr • Direct

$210

$58

-$152

72%

Find flights from Ontario to anywhere

Loading map...

Looking for inspiration on destinations? Here are some popular flight deals from Ontario one-way fares:

Denver, United States - from $29 (direct)

Las Vegas, United States - from $45 (direct)

San Francisco, United States - from $55 (direct)

Houston, United States - from $54 (direct)

Kansas City, United States - from $64 (1 stop • Denver (DEN))

Salt Lake City, United States - from $64 (1 stop • Denver (DEN))

Phoenix, United States - from $64 (1 stop • Denver (DEN))

El Paso, United States - from $64 (1 stop • Denver (DEN))

San Antonio, United States - from $64 (1 stop • Denver (DEN))

Charlotte, United States - from $64 (1 stop • Denver (DEN))

See more destinations you can fly to from Ontario – anywhere in the world at the best prices.

See More Destinations

Last-Minute Flights from Ontario

The best flight deals leaving from Ontario soon

Mon, Mar 16

⌛ Last-Minute

Washington, D.C., United States

Ontario (ONT) - Washington, D.C. (IAD)

Frontier Airlines airlines • 2 stops • Las Vegas (LAS), Provo (PVU)

$410

$314

-$96

23%

Mon, Mar 16

⌛ Last-Minute

Washington, D.C., United States

Ontario (ONT) - Washington, D.C. (IAD)

United Airlines airlines • 1 stop • San Francisco (SFO)

$410

$459

+$49

12%

Tue, Mar 17

⌛ Last-Minute

Indianapolis, United States

Ontario (ONT) - Indianapolis (IND)

Frontier Airlines airlines • 1 stop • Denver (DEN)

$625

$387

-$238

38%

Tue, Mar 17

⌛ Last-Minute

Nashville, United States

Ontario (ONT) - Nashville (BNA)

Hawaiian Airlines airlines • 1 stop • Seattle (SEA)

$400

$228

-$172

43%

Tue, Mar 17

⌛ Last-Minute

Washington, D.C., United States

Ontario (ONT) - Washington, D.C. (IAD)

Frontier Airlines airlines • 2 stops • Dallas (DFW), Atlanta (ATL)

$410

$277

-$133

32%

Tue, Mar 17

⌛ Last-Minute

Nashville, United States

Ontario (ONT) - Nashville (BNA)

United Airlines airlines • 1 stop • Chicago (ORD)

$400

$237

-$163

41%

See More Details

Facts About Flights from Ontario

Nearby airport(s)

Ontario International (ONT)

Ontario, United States

Insights for flights from Ontario

Cheapest route found

$150

Recent fare for flights from Ontario.

Cheapest month to fly

February

Average fares are lowest in this month.

Typical price range (round-trip)

150$ - 400$

For economy class tickets from Ontario, found in the last week.

Most popular airlines from Ontario

American Airlines

Alaska Airlines, Inc.

JetBlue Airways

Delta Air Lines

Frontier Airlines

Allegiant Air

Hawaiian Airlines

ONT Airport Deal Stats

Current most discounted routes

ONT - Paris

77% OFF

ONT - Rome

76% OFF

ONT - Barcelona

75% OFF

Avg. most discounted routes (last 3 months)

ONT - Cebu

73% OFF

ONT - Shanghai

71% OFF

ONT - London

69% OFF

ONT airport insights

Best days to catch a deal

Sunday, Monday

For the best flight deals from Ontario International Airport, focus on booking flights on Saturdays, as it has the lowest count of cheapest deals found. Sundays also offer a higher chance of finding deals compared to other days at Ontario International Airport.

Avg. deal survival time

13.8 hours

Deals from Ontario International airport last for an average of 13.8 hours. You should book quickly to avoid missing out on these deals.

Rare deal frequency

15 deals

We found 15 rare deals originating from Ontario International Airport in the past month. These rare deals, which usually include mistake fares, special promotions, or ultra-discounts, received an AI Deal Score of 90+.

Average price drop

-56%

Deals that originate from Ontario International Airport {{ONT}} have an average price drop of 55.9%. If you're flying out of Ontario International Airport {{ONT}}, you have a good chance of finding a deal.

Next 4 weeks: deal forecast

Flight Forecast: Ontario International

Based on our forecast from 3/6/2026, flight deals from Ontario International are expected to remain stable next month. There are no major price drops or increases anticipated at this time.

Top 5 biggest price drops (last 3 months)

Found on March 4

ONT - Paris

$1,650 → $387

77%

Found on March 1

ONT - Rome

$1,000 → $243

76%

Found on March 1

ONT - Barcelona

$1,190 → $297

75%

Found on March 1

ONT - Cebu

$1,175 → $319

73%

Found on March 1

ONT - Shanghai

$1,375 → $399

71%

Check these nearby airports too

Looking for more options? These airports near ONT sometimes drop rare deals too:

Palm Springs International (PSP)

~11 rare deals/month

San Diego International (SAN)

~10 rare deals/month

John Wayne (SNA)

~3 rare deals/month

If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially PSP and SAN for long-haul deal surprises.

Travel Trends: Popular Destinations from Ontario

Every month, we analyze search and booking data to see where travelers from Ontario are heading. Here are the current hot destinations from Ontario:

Top domestic destinations

Vancouver

TOP

Ontario

Calgary

TOP

Ontario

Montreal

TOP

Ontario

These cities are seeing the most searches and bookings from Ontario this month.

Top international destinations

London

TOP

United Kingdom

Rome

TOP

Italy

Tokyo

TOP

Japan

Travelers from Ontario are flocking here, possibly due to seasonal events or great deals.

Travel trend insight

Travelers from Ontario are increasingly seeking culturally rich experiences abroad. London, Rome, and Tokyo are trending due to their historical significance, iconic landmarks, and unique cultural offerings, providing diverse and memorable travel experiences.

Booking Flights from Ontario: Frequently Asked Questions

Flight costs from Ontario, CA, can vary wildly depending on your destination, the time of year, and how far in advance you book. For example, a short hop to Las Vegas might only set you back $50-$100, while a transcontinental flight to New York could range from $200-$500. International flights, of course, will be pricier, potentially costing anywhere from $500 to several thousand dollars. To snag the best deal, consider using RatePunk Flights Search to monitor prices and set up fare alerts for your desired routes. Remember, flexibility is your friend – flying on weekdays or during the off-season can save you some serious cash.

Booking cheap flights is an art, not a science! Start by being flexible with your travel dates; flying mid-week or during the shoulder season (spring and fall) is usually cheaper. Keep an eye on budget airlines that fly from Ontario, as they often have promotional fares. Setting up fare alerts on websites like RatePunk will notify you when prices drop. Also, consider booking connecting flights instead of direct ones, as they can sometimes be significantly cheaper. Finally, don't be afraid to mix and match airlines – flying out on one airline and back on another can sometimes yield a better deal.

Generally, the sweet spot for snagging the cheapest flights from Ontario is during the shoulder seasons (spring and fall). Summer and major holidays (Thanksgiving, Christmas) are peak travel times, which means higher prices. If you're looking to escape the summer heat, consider flying in late spring (April-May) or early fall (September-October). Conversely, if you're dreaming of a winter getaway, look at traveling in January or February. The key is to avoid the crowds and be flexible with your dates.

Pro Tips for Finding Cheap Flights from Ontario

Finding the cheapest airfare from Ontario is easier if you use a few smart strategies. Here are our top tips to help you score a great deal:

Be Flexible with Dates: Sometimes shifting your travel dates by just a day or two can lead to significant savings. Mid-week flights are often cheaper than weekend flights, and consider flying on holidays themselves!

Set Destination to 'Anywhere': Not sure where to go? Set your destination to 'Anywhere' on flight search engines. You might stumble upon a ridiculously cheap flight to a place you've never considered. It is a fun way to pick your next trip!

Explore More Destinations from Ontario

Looking for more options? Here are some popular routes and related travel deals:

Flights from Ontario to Amsterdam - Find cheap flights from Ontario to AMS

Flights from Ontario to Madrid - Find cheap flights from Ontario to MAD

Cheap flights to Ontario - Searching for cheap flights to Ontario? (Great for fiends/family visiting you, or return trips.)

Search more flights

Complete your trip

Hotels in Ontario

Car hire in Ontario

coming soon

$93 Cheap Flights from Ontario

One-way

Departing from

Going to

Departing from

Ontario

Going to

anywhere

Santa Rosa (STS)

United States • May, 2026

100% AI deal score

$650 $137

Boise (BOI)

United States • May, 2026

91% AI deal score

$540 $155

San José del Cabo (SJD)

Mexico • March, 2026

86% AI deal score

$398 $93

San Salvador (SAL)

El Salvador • April, 2026

84% AI deal score

$405 $127

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Santa Rosa, United States

TOP

May • Direct

$325

$68

-$257

79%

Boise, United States

TOP

May • Direct

$270

$78

-$192

71%

Portland, United States

TOP

Mar • Direct

$215

$74

-$141

66%

Seattle, United States

TOP

Apr • Direct

$183

$77

-$106

58%

Denver, United States

TOP

Apr • Direct

$210

$58

-$152

72%

Find flights from Ontario to anywhere

Loading map...

Looking for inspiration on destinations? Here are some popular flight deals from Ontario one-way fares:

Denver, United States - from $29 (direct)

Las Vegas, United States - from $45 (direct)

San Francisco, United States - from $55 (direct)

Houston, United States - from $54 (direct)

Kansas City, United States - from $64 (1 stop • Denver (DEN))

Salt Lake City, United States - from $64 (1 stop • Denver (DEN))

Phoenix, United States - from $64 (1 stop • Denver (DEN))

El Paso, United States - from $64 (1 stop • Denver (DEN))

San Antonio, United States - from $64 (1 stop • Denver (DEN))

Charlotte, United States - from $64 (1 stop • Denver (DEN))

See more destinations you can fly to from Ontario – anywhere in the world at the best prices.

See More Destinations

Last-Minute Flights from Ontario

The best flight deals leaving from Ontario soon

Mon, Mar 16

⌛ Last-Minute

Washington, D.C., United States

Ontario (ONT) - Washington, D.C. (IAD)

Frontier Airlines airlines • 2 stops • Las Vegas (LAS), Provo (PVU)

$410

$314

-$96

23%

Mon, Mar 16

⌛ Last-Minute

Washington, D.C., United States

Ontario (ONT) - Washington, D.C. (IAD)

United Airlines airlines • 1 stop • San Francisco (SFO)

$410

$459

+$49

12%

Tue, Mar 17

⌛ Last-Minute

Indianapolis, United States

Ontario (ONT) - Indianapolis (IND)

Frontier Airlines airlines • 1 stop • Denver (DEN)

$625

$387

-$238

38%

Tue, Mar 17

⌛ Last-Minute

Nashville, United States

Ontario (ONT) - Nashville (BNA)

Hawaiian Airlines airlines • 1 stop • Seattle (SEA)

$400

$228

-$172

43%

Tue, Mar 17

⌛ Last-Minute

Washington, D.C., United States

Ontario (ONT) - Washington, D.C. (IAD)

Frontier Airlines airlines • 2 stops • Dallas (DFW), Atlanta (ATL)

$410

$277

-$133

32%

Tue, Mar 17

⌛ Last-Minute

Nashville, United States

Ontario (ONT) - Nashville (BNA)

United Airlines airlines • 1 stop • Chicago (ORD)

$400

$237

-$163

41%

See More Details

Facts About Flights from Ontario

Nearby airport(s)

Ontario International (ONT)

Ontario, United States

Insights for flights from Ontario

Cheapest route found

$150

Recent fare for flights from Ontario.

Cheapest month to fly

February

Average fares are lowest in this month.

Typical price range (round-trip)

150$ - 400$

For economy class tickets from Ontario, found in the last week.

Most popular airlines from Ontario

American Airlines

Alaska Airlines, Inc.

JetBlue Airways

Delta Air Lines

Frontier Airlines

Allegiant Air

Hawaiian Airlines

ONT Airport Deal Stats

Current most discounted routes

ONT - Paris

77% OFF

ONT - Rome

76% OFF

ONT - Barcelona

75% OFF

Avg. most discounted routes (last 3 months)

ONT - Cebu

73% OFF

ONT - Shanghai

71% OFF

ONT - London

69% OFF

ONT airport insights

Best days to catch a deal

Sunday, Monday

Avg. deal survival time

13.8 hours

Deals from Ontario International airport last for an average of 13.8 hours. You should book quickly to avoid missing out on these deals.

Rare deal frequency

15 deals

Average price drop

-56%

Next 4 weeks: deal forecast

Flight Forecast: Ontario International

Based on our forecast from 3/6/2026, flight deals from Ontario International are expected to remain stable next month. There are no major price drops or increases anticipated at this time.

Top 5 biggest price drops (last 3 months)

Found on March 4

ONT - Paris

$1,650 → $387

77%

Found on March 1

ONT - Rome

$1,000 → $243

76%

Found on March 1

ONT - Barcelona

$1,190 → $297

75%

Found on March 1

ONT - Cebu

$1,175 → $319

73%

Found on March 1

ONT - Shanghai

$1,375 → $399

71%

Check these nearby airports too

Looking for more options? These airports near ONT sometimes drop rare deals too:

Palm Springs International (PSP)

~11 rare deals/month

San Diego International (SAN)

~10 rare deals/month

John Wayne (SNA)

~3 rare deals/month

If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially PSP and SAN for long-haul deal surprises.

Travel Trends: Popular Destinations from Ontario

Every month, we analyze search and booking data to see where travelers from Ontario are heading. Here are the current hot destinations from Ontario:

Top domestic destinations

Vancouver

TOP

Ontario

Calgary

TOP

Ontario

Montreal

TOP

Ontario

These cities are seeing the most searches and bookings from Ontario this month.

Top international destinations

London

TOP

United Kingdom

Rome

TOP

Italy

Tokyo

TOP

Japan

Travelers from Ontario are flocking here, possibly due to seasonal events or great deals.

Travel trend insight

Booking Flights from Ontario: Frequently Asked Questions

Pro Tips for Finding Cheap Flights from Ontario

Finding the cheapest airfare from Ontario is easier if you use a few smart strategies. Here are our top tips to help you score a great deal:

Explore More Destinations from Ontario

Looking for more options? Here are some popular routes and related travel deals:

Flights from Ontario to Amsterdam - Find cheap flights from Ontario to AMS

Flights from Ontario to Madrid - Find cheap flights from Ontario to MAD

Cheap flights to Ontario - Searching for cheap flights to Ontario? (Great for fiends/family visiting you, or return trips.)

Search more flights

Complete your trip

Hotels in Ontario

Car hire in Ontario

coming soon

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$93 Cheap Flights from Ontario

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Santa Rosa, United States

$68

Boise, United States

$78

Portland, United States

$74

Seattle, United States

$77

Denver, United States

$58

Find flights from Ontario to anywhere

Last-Minute Flights from Ontario

The best flight deals leaving from Ontario soon

Mon, Mar 16

Ontario (ONT) - Washington, D.C. (IAD)

$314

Mon, Mar 16

Ontario (ONT) - Washington, D.C. (IAD)

$459

Tue, Mar 17

Ontario (ONT) - Indianapolis (IND)

$387

Tue, Mar 17

Ontario (ONT) - Nashville (BNA)

$228

Tue, Mar 17

Ontario (ONT) - Washington, D.C. (IAD)

$277

Tue, Mar 17

Ontario (ONT) - Nashville (BNA)

$237

Facts About Flights from Ontario

Nearby airport(s)

Ontario International (ONT)

Insights for flights from Ontario

$150

February

150$ - 400$

Most popular airlines from Ontario

ONT Airport Deal Stats

Current most discounted routes

Avg. most discounted routes (last 3 months)

ONT airport insights

Sunday, Monday

13.8 hours

15 deals

-56%

Flight Forecast: Ontario International

Top 5 biggest price drops (last 3 months)

ONT - Paris

ONT - Rome

ONT - Barcelona

ONT - Cebu

ONT - Shanghai

Check these nearby airports too

Palm Springs International (PSP)

San Diego International (SAN)

John Wayne (SNA)

Travel Trends: Popular Destinations from Ontario

Top domestic destinations

Vancouver

Calgary

Montreal

Top international destinations

London

Rome

Tokyo

Travel trend insight

Booking Flights from Ontario: Frequently Asked Questions

How much does it typically cost to fly from Ontario, CA?

How much does it typically cost to fly from Ontario, CA?

What are some insider tips for booking cheap flights from Ontario?

What are some insider tips for booking cheap flights from Ontario?

When is the best time of year to fly out of Ontario for the lowest prices?

When is the best time of year to fly out of Ontario for the lowest prices?