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Find deals on international flights to Ontario from $39

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 7/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Mon 7/8
Mon 7/15

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In the last 7 days travelers have searched 43,695,497 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

May

Cheapest flight

$39
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Seattle to Ontario

FAQs for booking Worldwide to Ontario flights

  • How does KAYAK find such low prices on flights from Worldwide to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Worldwide to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Worldwide to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Worldwide is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Worldwide to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Worldwide with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Worldwide to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Worldwide up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Worldwide to Ontario?

Nonstop departures

Worldwide to Ontario

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights

Nonstop returns

Ontario to Worldwide

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights
See more direct flights

Book cheap flights from Worldwide to Ontario

Recent round-trip flight deals

8/3Sat
nonstopFrontier
1h 25mSFO-ONT
8/10Sat
nonstopFrontier
1h 26mONT-SFO
$43
9/25Wed
nonstopFrontier
1h 21mSFO-ONT
10/1Tue
nonstopFrontier
1h 26mONT-SFO
$44
9/21Sat
nonstop
3h 02mDFW-ONT
9/25Wed
1 stop
10h 00mONT-DFW
$150
7/16Tue
nonstop
2h 47mSEA-ONT
7/24Wed
1 stop
5h 32mONT-SEA
$152
7/9Tue
nonstopAlaska Airlines
2h 33mSEA-ONT
7/13Sat
nonstopAlaska Airlines
2h 35mONT-SEA
$177
7/10Wed
nonstopAlaska Airlines
2h 33mSEA-ONT
7/13Sat
1 stopAlaska Airlines
5h 32mONT-SEA
$186
11/15Fri
nonstopUnited Airlines
2h 23mDEN-ONT
11/16Sat
1 stopUnited Airlines
7h 17mONT-DEN
$187
7/3Wed
1 stopDelta
6h 48mSEA-ONT
7/9Tue
nonstopDelta
2h 44mONT-SEA
$192
11/12Tue
1 stopDelta
6h 11mDEN-ONT
11/19Tue
1 stopDelta
4h 30mONT-DEN
$196
7/13Sat
nonstopUnited Airlines
1h 30mSFO-ONT
7/13Sat
nonstopUnited Airlines
1h 23mONT-SFO
$197

Search by stops

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Recent one-way flight deals

7/10Wed
nonstopFrontier
2h 47mSEA-ONT
$39
11/16Sat
nonstopFrontier
3h 02mDFW-ONT
$39
9/28Sat
nonstopAmerican Airlines
3h 06mDFW-ONT
$70
7/9Tue
nonstopAlaska Airlines
2h 35mSEA-ONT
$79
8/27Tue
1 stopDelta
6h 44mSEA-ONT
$88
7/16Tue
1 stopDelta
7h 04mDEN-ONT
$98
7/11Thu
1 stopAmerican Airlines
5h 24mORD-ONT
$99
7/4Thu
nonstopUnited Airlines
1h 30mSFO-ONT
$99
9/5Thu
1 stopUnited Airlines
7h 37mDFW-ONT
$104
8/11Sun
nonstopAlaska Airlines
2h 33mSEA-ONT
$109

Search by stops

Search by airline

Search by price

Last minute flights from Worldwide to Ontario

Last minute flight, train and bus deals

6/13Thu
nonstopFrontier
1h 23mSFO-ONT
6/20Thu
nonstopFrontier
1h 27mONT-SFO
$86
6/13Thu
nonstopFrontier
2h 20mDEN-ONT
6/19Wed
nonstopFrontier
2h 20mONT-DEN
$86
6/11Tue
nonstopFrontier
1h 23mSFO-ONT
6/13Thu
nonstopFrontier
1h 27mONT-SFO
$88
6/11Tue
multi-stopDelta
8h 31mORD-ONT
6/17Mon
multi-stopDelta
11h 02mONT-ORD
$284
6/10Mon
multi-stopDelta
11h 00mLGA-ONT
6/17Mon
multi-stopDelta
8h 44mONT-LGA
$286
6/10Mon
multi-stopAmerican Airlines
6h 06mORD-ONT
6/13Thu
multi-stopAmerican Airlines
7h 48mONT-ORD
$322
6/12Wed
nonstopUnited Airlines
1h 35mSFO-ONT
6/15Sat
nonstopUnited Airlines
1h 25mONT-SFO
$324
6/12Wed
multi-stopAmerican Airlines
8h 48mORD-ONT
6/15Sat
multi-stopAmerican Airlines
7h 58mONT-ORD
$350
6/11Tue
multi-stopUnited Airlines
8h 53mLGA-ONT
6/18Tue
multi-stopUnited Airlines
9h 14mONT-LGA
$386
6/10Mon
multi-stopSouthwest
10h 05mLGA-ONT
6/12Wed
multi-stopSouthwest
10h 30mONT-LGA
$436

Search by stops

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Worldwide

Cabin classes:

$447
$478
$193
$35