$98 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 $136

San José del Cabo (SJD)

Mexico • February, 2026

94% AI deal score

$590 $98

Boise (BOI)

United States • May, 2026

92% AI deal score

$540 $157

Denver (DEN)

United States • April, 2026

84% AI deal score

$498 $191

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Denver, United States

TOP

Mar • Direct

$210

$56

-$154

73%

Las Vegas, United States

TOP

Apr • Direct

$68

$28

-$40

59%

Find flights from Ontario to anywhere

Loading map...

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

Las Vegas, United States - from $28 (direct)

Denver, United States - from $28 (direct)

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

Los Angeles, United States - from $65 (1 stop • Las Vegas (LAS))

Miami, United States - from $66 (1 stop • Denver (DEN))

Kansas City, United States - from $66 (1 stop • Denver (DEN))

Oklahoma City, United States - from $68 (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 2

⌛ Last-Minute

Agadir, Morocco

Ontario (ONT) - Agadir (AGA)

Frontier Airlines airlines • 3 stops • Denver (DEN), Reykjavik (KEF), Glasgow (GLA)

$1,260

$454

-$806

64%

Mon, Mar 2

⌛ Last-Minute

Vancouver, Canada

Ontario (ONT) - Vancouver (YVR)

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

$473

$105

-$368

78%

Mon, Mar 2

⌛ Last-Minute

Tokyo, Japan

Ontario (ONT) - Tokyo (HND)

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

$1,210

$437

-$773

64%

Mon, Mar 2

⌛ Last-Minute

Istanbul, Turkey

Ontario (ONT) - Istanbul (SAW)

Frontier Airlines airlines • 3 stops • Denver (DEN), Reykjavik (KEF), Copenhagen (CPH)

$1,850

$436

-$1,414

76%

Mon, Mar 2

⌛ Last-Minute

Milan, Italy

Ontario (ONT) - Milan (BGY)

Hawaiian Airlines airlines • 3 stops • Seattle (SEA), New York (JFK), Warsaw (WAW)

$570

$635

+$65

11%

Mon, Mar 2

⌛ Last-Minute

Houston, United States

Ontario (ONT) - Houston (IAH)

Frontier Airlines airlines • Direct

$73

$124

+$51

70%

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

88% OFF

ONT - Bangkok

87% OFF

ONT - Istanbul

80% OFF

Avg. most discounted routes (last 3 months)

ONT - Bangkok

79% OFF

ONT - Santa Rosa

79% OFF

ONT - Rome

77% OFF

ONT airport insights

Best days to catch a deal

Wednesday, Sunday

To get the best flight deals from Ontario International Airport, consider booking flights on Tuesdays, as that's when the lowest prices are most frequently found; avoid Wednesdays for booking flights from Ontario International Airport, as that day has the fewest deals.

Avg. deal survival time

16.4 hours

Deals from Ontario International airport last an average of 16.4 hours. If you see a deal you like, make sure to book it quickly, as it may not last long.

Rare deal frequency

10 deals

We found 10 rare deals originating from Ontario International Airport in the past month. These rare deals, with an AI Deal Score of 90+, usually consist of mistake fares, special promotions, or ultra-discounts.

Average price drop

-60%

The average price drop for flight deals originating from Ontario International airport is 59.9%. This means travelers can save significantly on flights departing from Ontario International.

Next 4 weeks: deal forecast

Ontario International Airport: Next Month Flight Forecast

Based on current data from 2/20/2026, flights from Ontario International are expected to remain relatively stable next month. There are no significant price drops or increases anticipated at this time.

Top 5 biggest price drops (last 3 months)

Found on February 19

ONT - Vancouver

$600 → $72

88%

Found on February 16

ONT - Bangkok

$3,150 → $411

87%

Found on February 15

ONT - Istanbul

$1,850 → $371

80%

Found on February 16

ONT - Bangkok

$2,025 → $430

79%

Found on February 18

ONT - Santa Rosa

$650 → $136

79%

Check these nearby airports too

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

Los Angeles International (LAX)

~14 rare deals/month

San Diego International (SAN)

~6 rare deals/month

John Wayne (SNA)

~8 rare deals/month

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

$98 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 $136

San José del Cabo (SJD)

Mexico • February, 2026

94% AI deal score

$590 $98

Boise (BOI)

United States • May, 2026

92% AI deal score

$540 $157

Denver (DEN)

United States • April, 2026

84% AI deal score

$498 $191

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Denver, United States

TOP

Mar • Direct

$210

$56

-$154

73%

Las Vegas, United States

TOP

Apr • Direct

$68

$28

-$40

59%

Find flights from Ontario to anywhere

Loading map...

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

Las Vegas, United States - from $28 (direct)

Denver, United States - from $28 (direct)

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

Los Angeles, United States - from $65 (1 stop • Las Vegas (LAS))

Miami, United States - from $66 (1 stop • Denver (DEN))

Kansas City, United States - from $66 (1 stop • Denver (DEN))

Oklahoma City, United States - from $68 (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 2

⌛ Last-Minute

Agadir, Morocco

Ontario (ONT) - Agadir (AGA)

Frontier Airlines airlines • 3 stops • Denver (DEN), Reykjavik (KEF), Glasgow (GLA)

$1,260

$454

-$806

64%

Mon, Mar 2

⌛ Last-Minute

Vancouver, Canada

Ontario (ONT) - Vancouver (YVR)

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

$473

$105

-$368

78%

Mon, Mar 2

⌛ Last-Minute

Tokyo, Japan

Ontario (ONT) - Tokyo (HND)

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

$1,210

$437

-$773

64%

Mon, Mar 2

⌛ Last-Minute

Istanbul, Turkey

Ontario (ONT) - Istanbul (SAW)

Frontier Airlines airlines • 3 stops • Denver (DEN), Reykjavik (KEF), Copenhagen (CPH)

$1,850

$436

-$1,414

76%

Mon, Mar 2

⌛ Last-Minute

Milan, Italy

Ontario (ONT) - Milan (BGY)

Hawaiian Airlines airlines • 3 stops • Seattle (SEA), New York (JFK), Warsaw (WAW)

$570

$635

+$65

11%

Mon, Mar 2

⌛ Last-Minute

Houston, United States

Ontario (ONT) - Houston (IAH)

Frontier Airlines airlines • Direct

$73

$124

+$51

70%

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

88% OFF

ONT - Bangkok

87% OFF

ONT - Istanbul

80% OFF

Avg. most discounted routes (last 3 months)

ONT - Bangkok

79% OFF

ONT - Santa Rosa

79% OFF

ONT - Rome

77% OFF

ONT airport insights

Best days to catch a deal

Wednesday, Sunday

Avg. deal survival time

16.4 hours

Deals from Ontario International airport last an average of 16.4 hours. If you see a deal you like, make sure to book it quickly, as it may not last long.

Rare deal frequency

10 deals

Average price drop

-60%

The average price drop for flight deals originating from Ontario International airport is 59.9%. This means travelers can save significantly on flights departing from Ontario International.

Next 4 weeks: deal forecast

Ontario International Airport: Next Month Flight Forecast

Top 5 biggest price drops (last 3 months)

Found on February 19

ONT - Vancouver

$600 → $72

88%

Found on February 16

ONT - Bangkok

$3,150 → $411

87%

Found on February 15

ONT - Istanbul

$1,850 → $371

80%

Found on February 16

ONT - Bangkok

$2,025 → $430

79%

Found on February 18

ONT - Santa Rosa

$650 → $136

79%

Check these nearby airports too

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

Los Angeles International (LAX)

~14 rare deals/month

San Diego International (SAN)

~6 rare deals/month

John Wayne (SNA)

~8 rare deals/month

If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially LAX 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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$98 Cheap Flights from Ontario

Top Destinations Where Can You Fly from Ontario

Cheap flights from Ontario

Denver, United States

$56

Las Vegas, United States

$28

Find flights from Ontario to anywhere

Last-Minute Flights from Ontario

The best flight deals leaving from Ontario soon

Mon, Mar 2

Ontario (ONT) - Agadir (AGA)

$454

Mon, Mar 2

Ontario (ONT) - Vancouver (YVR)

$105

Mon, Mar 2

Ontario (ONT) - Tokyo (HND)

$437

Mon, Mar 2

Ontario (ONT) - Istanbul (SAW)

$436

Mon, Mar 2

Ontario (ONT) - Milan (BGY)

$635

Mon, Mar 2

Ontario (ONT) - Houston (IAH)

$124

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

Wednesday, Sunday

16.4 hours

10 deals

-60%

Ontario International Airport: Next Month Flight Forecast

Top 5 biggest price drops (last 3 months)

ONT - Vancouver

ONT - Bangkok

ONT - Istanbul

ONT - Bangkok

ONT - Santa Rosa

Check these nearby airports too

Los Angeles International (LAX)

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?

Which airports are popular destinations from Ontario, and why?

Which airports are popular destinations from Ontario, and why?

Are there alternative airports near Ontario that I should consider?

Are there alternative airports near Ontario that I should consider?

Pro Tips for Finding Cheap Flights from Ontario

Explore More Destinations from Ontario