$69 Cheap Flights from Ontario

One-way

Departing from

Going to

Departing from

Ontario

Going to

anywhere

Santa Rosa (STS)

United States • March, 2026

95% AI deal score

$543 $79

San Salvador (SAL)

El Salvador • January, 2026

93% AI deal score

$855 $91

Boise (BOI)

United States • May, 2026

86% AI deal score

$315 $89

San José del Cabo (SJD)

Mexico • March, 2026

84% AI deal score

$398 $107

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Dallas, United States

TOP

Feb • Direct

$198

$35

-$163

82%

Dallas, United States

TOP

Feb • Direct

$198

$35

-$163

82%

Dallas, United States

TOP

Jan • Direct

$198

$44

-$154

78%

Houston, United States

TOP

Feb • Direct

$218

$56

-$162

74%

Houston, United States

TOP

Feb • Direct

$218

$56

-$162

74%

Denver, United States

TOP

Feb • Direct

$140

$29

-$111

79%

Find flights from Ontario to anywhere

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

Las Vegas, United States - from $29 (direct)

Denver, United States - from $29 (direct)

San Francisco, United States - from $29 (direct)

Dallas, United States - from $35 (direct)

Vancouver, Canada - from $50 (1 stop • Las Vegas (LAS))

San Diego, United States - from $54 (1 stop • Denver (DEN))

Houston, United States - from $56 (direct)

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, Jan 19

⌛ Last-Minute

Phuket City, Thailand

Ontario (ONT) - Phuket City (HKT)

Korean Air airlines • 2 stops • Salt Lake City (SLC), Seoul (ICN)

$690

$387

-$303

44%

Mon, Jan 19

⌛ Last-Minute

Las Vegas, United States

Ontario (ONT) - Las Vegas (LAS)

Frontier Airlines airlines • Direct

$73

$49

-$24

33%

Mon, Jan 19

⌛ Last-Minute

San Francisco, United States

Ontario (ONT) - San Francisco (SFO)

Frontier Airlines airlines • Direct

$118

$101

-$17

14%

Mon, Jan 19

⌛ Last-Minute

Las Vegas, United States

Ontario (ONT) - Las Vegas (LAS)

Frontier Airlines airlines • Direct

$73

$49

-$24

33%

Tue, Jan 20

⌛ Last-Minute

Tokyo, Japan

Ontario (ONT) - Tokyo (HND)

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

$1,790

$396

-$1,394

78%

Tue, Jan 20

⌛ Last-Minute

London, United Kingdom

Ontario (ONT) - London (LHR)

United Airlines airlines • 1 stop • Denver (DEN)

$1,035

$384

-$651

63%

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 - Vancouver

92% OFF

ONT - San Salvador

89% OFF

ONT - Guatemala City

85% OFF

Avg. most discounted routes (last 3 months)

ONT - Managua

84% OFF

ONT - Bangkok

83% OFF

ONT - Morelia

81% OFF

ONT airport insights

Best days to catch a deal

Thursday, Monday

For the best deals from Ontario International Airport, aim to book flights on Tuesdays, as that's when the lowest prices are most frequently found. Booking flights departing on Wednesdays or Sundays originating from Ontario International Airport may also present opportunities for savings.

Avg. deal survival time

8.8 hours

Deals from Ontario International Airport (ONT) last about 8.8 hours on average. You'll need to act fast if you find a deal you like from ONT!

Rare deal frequency

14 deals

We've identified 14 rare deals originating from Ontario International Airport in the last month. These rare deals, typically mistake fares, special promotions, or ultra-discounts, achieved an AI Deal Score of 90+.

Average price drop

-69%

Deals that originate from Ontario International airport average a price drop of 69.2%. Don't miss out on savings from {{ ontario international airport }}.

Next 4 weeks: deal forecast

Ontario International Flight Deals Forecast

Based on our analysis, flight deals from Ontario International {{ airport }} are expected to remain stable over the next month. There are no major price drops or increases anticipated at this time.

Top 5 biggest price drops (last 3 months)

Found on January 5

ONT - Vancouver

$600 → $50

92%

Found on January 5

ONT - San Salvador

$855 → $91

89%

Found on January 5

ONT - Guatemala City

$915 → $133

85%

Found on January 7

ONT - Managua

$960 → $157

84%

Found on January 3

ONT - Bangkok

$2,025 → $335

83%

Check these nearby airports too

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

Los Angeles International (LAX)

~9 rare deals/month

Palm Springs International (PSP)

~8 rare deals/month

John Wayne (SNA)

~9 rare deals/month

If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially LAX and PSP 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.)

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$69 Cheap Flights from Ontario

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Dallas, United States

$35

Dallas, United States

$35

Dallas, United States

$44

Houston, United States

$56

Houston, United States

$56

Denver, United States

$29

Find flights from Ontario to anywhere

Last-Minute Flights from Ontario

The best flight deals leaving from Ontario soon

Mon, Jan 19

Ontario (ONT) - Phuket City (HKT)

$387

Mon, Jan 19

Ontario (ONT) - Las Vegas (LAS)

$49

Mon, Jan 19

Ontario (ONT) - San Francisco (SFO)

$101

Mon, Jan 19

Ontario (ONT) - Las Vegas (LAS)

$49

Tue, Jan 20

Ontario (ONT) - Tokyo (HND)

$396

Tue, Jan 20

Ontario (ONT) - London (LHR)

$384

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

Thursday, Monday

8.8 hours

14 deals

-69%

Ontario International Flight Deals Forecast

Top 5 biggest price drops (last 3 months)

ONT - Vancouver

ONT - San Salvador

ONT - Guatemala City

ONT - Managua

ONT - Bangkok

Check these nearby airports too

Los Angeles International (LAX)

Palm Springs International (PSP)

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?