$148 Cheap Flights from Ontario

One-way

Departing from

Going to

Departing from

Ontario

Going to

anywhere

Tokyo (HND)

Japan • February, 2026

98% AI deal score

$1,790 $340

Osaka (KIX)

Japan • February, 2026

95% AI deal score

$1,135 $359

Portland (PDX)

United States • January, 2026

94% AI deal score

$1,195 $387

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Dallas, United States

TOP

Jan • Direct

$198

$29

-$169

85%

Dallas, United States

TOP

Feb • Direct

$198

$35

-$163

82%

Dallas, United States

TOP

Jan • Direct

$198

$29

-$169

85%

Denver, United States

TOP

Jan • Direct

$140

$29

-$111

79%

Denver, United States

TOP

Feb • Direct

$140

$29

-$111

79%

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:

Dallas, United States - from $29 (direct)

Denver, United States - from $29 (direct)

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

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

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 12

⌛ Last-Minute

Valencia, Spain

Ontario (ONT) - Valencia (VLC)

Hawaiian Airlines airlines • 3 stops • Seattle (SEA), New York (EWR), Lisbon (LIS)

$640

$577

-$63

10%

Mon, Jan 12

⌛ Last-Minute

Valencia, Spain

Ontario (ONT) - Valencia (VLC)

Frontier Airlines airlines • 3 stops • Las Vegas (LAS), New York (JFK), Madrid (MAD)

$640

$557

-$83

13%

Mon, Jan 12

⌛ Last-Minute

Las Vegas, United States

Ontario (ONT) - Las Vegas (LAS)

Frontier Airlines airlines • Direct

$73

$96

+$23

32%

Mon, Jan 12

⌛ Last-Minute

Valencia, Spain

Ontario (ONT) - Valencia (VLC)

Frontier Airlines airlines • 3 stops • Houston (IAH), Miami (MIA), Paris (ORY)

$640

$547

-$93

15%

Mon, Jan 12

⌛ Last-Minute

Valencia, Spain

Ontario (ONT) - Valencia (VLC)

Frontier Airlines airlines • 3 stops • Las Vegas (LAS), Los Angeles (LAX), Lisbon (LIS)

$640

$561

-$79

12%

Mon, Jan 12

⌛ Last-Minute

Las Vegas, United States

Ontario (ONT) - Las Vegas (LAS)

Frontier Airlines airlines • Direct

$73

$96

+$23

32%

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 - Guatemala City

86% OFF

ONT - Bangkok

84% OFF

Avg. most discounted routes (last 3 months)

ONT - Managua

83% OFF

ONT - San Salvador

83% OFF

ONT - Tokyo

81% OFF

ONT airport insights

Best days to catch a deal

Friday, Saturday

For the best flight deals from Ontario International Airport, Friday is the most likely day to find discounts based on recent trends. Deals are also frequently found on Mondays and Saturdays when departing from Ontario International.

Avg. deal survival time

11.2 hours

Deals from Ontario International Airport typically last for around 11.2 hours. It's important to book quickly when you find a deal you like, as these opportunities can disappear fast.

Rare deal frequency

8 deals

We found 8 rare flight deals originating from Ontario International Airport in the last month. These rare deals, which usually consist of mistake fares, special promotions or ultra-discounts, received an AI Deal Score of 90+.

Average price drop

-69%

Deals that originate from Ontario International airport see an average price drop of 68.5%. This makes Ontario International a great place to start when looking for flight deals.

Next 4 weeks: deal forecast

Ontario International Airport Flight Forecast

Based on current data for ONT, flight prices are expected to remain stable next month. There are no significant price drops or increases forecasted at this time.

Top 5 biggest price drops (last 3 months)

Found on January 1

ONT - Vancouver

$600 → $50

92%

Found on January 1

ONT - Guatemala City

$915 → $131

86%

Found on December 31

ONT - Bangkok

$2,025 → $334

84%

Found on December 28

ONT - Managua

$960 → $163

83%

Found on January 1

ONT - San Salvador

$855 → $148

83%

Check these nearby airports too

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

Palm Springs International (PSP)

~9 rare deals/month

San Diego International (SAN)

~11 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 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.)

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$148 Cheap Flights from Ontario

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Dallas, United States

$29

Dallas, United States

$35

Dallas, United States

$29

Denver, United States

$29

Denver, United States

$29

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 12

Ontario (ONT) - Valencia (VLC)

$577

Mon, Jan 12

Ontario (ONT) - Valencia (VLC)

$557

Mon, Jan 12

Ontario (ONT) - Las Vegas (LAS)

$96

Mon, Jan 12

Ontario (ONT) - Valencia (VLC)

$547

Mon, Jan 12

Ontario (ONT) - Valencia (VLC)

$561

Mon, Jan 12

Ontario (ONT) - Las Vegas (LAS)

$96

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

Friday, Saturday

11.2 hours

8 deals

-69%

Ontario International Airport Flight Forecast

Top 5 biggest price drops (last 3 months)

ONT - Vancouver

ONT - Guatemala City

ONT - Bangkok

ONT - Managua

ONT - San Salvador

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?