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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 5/29. 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 5/27
Mon 6/3

Search hundreds of travel sites at once for cheap international flights to Ontario

In the last 7 days travelers have searched 43,623,357 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

December

Cheapest flight

$39
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 22% increase in price.
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, +22 more

Aeromexico, Air Canada, +23 more

Tuesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Wednesday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Thursday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Friday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Saturday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 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, +22 more

Aeromexico, Air Canada, +23 more

Tuesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Wednesday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Thursday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Friday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Saturday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 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

5/7Tue
nonstopFrontier
1h 29mSFO-ONT
5/15Wed
nonstopFrontier
1h 27mONT-SFO
$48
5/15Wed
nonstopFrontier
1h 47mSLC-ONT
5/22Wed
nonstopFrontier
1h 44mONT-SLC
$48
5/25Sat
nonstop
2h 15mPDX-ONT
5/30Thu
1 stop
4h 29mONT-PDX
$132
5/14Tue
nonstopDelta
1h 48mSLC-ONT
5/22Wed
nonstopDelta
1h 48mONT-SLC
$139
6/1Sat
nonstopUnited Airlines
1h 32mSFO-ONT
6/3Mon
nonstopUnited Airlines
1h 25mONT-SFO
$179
5/29Wed
2 stops
9h 58mSFO-ONT
5/31Fri
nonstop
1h 28mONT-SFO
$191
6/5Wed
1 stopDelta
4h 31mPDX-ONT
6/11Tue
1 stopDelta
6h 52mONT-PDX
$196
7/9Tue
nonstopAlaska Airlines
2h 35mSEA-ONT
7/13Sat
nonstopAlaska Airlines
2h 35mONT-SEA
$197
5/18Sat
nonstopUnited Airlines
1h 34mSFO-ONT
5/20Mon
nonstopUnited Airlines
1h 28mONT-SFO
$215
5/11Sat
nonstopAlaska Airlines
2h 33mSEA-ONT
5/18Sat
nonstopAlaska Airlines
2h 41mONT-SEA
$237

Search by stops

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Search by price

Recent one-way flight deals

5/29Wed
nonstopFrontier
2h 44mSEA-ONT
$39
5/7Tue
nonstopFrontier
3h 22mDFW-ONT
$39
5/28Tue
1 stopUnited Airlines
6h 15mSEA-ONT
$88
5/12Sun
2 stops
27h 18mORD-ONT
$88
5/12Sun
2 stops
25h 03mORD-ONT
$92
5/18Sat
1 stopAmerican Airlines
6h 47mSEA-ONT
$98
5/29Wed
1 stopAlaska Airlines
7h 08mPDX-ONT
$98
5/29Wed
1 stopAmerican Airlines
4h 45mSEA-ONT
$104
6/2Sun
nonstopAlaska Airlines
2h 33mSEA-ONT
$108
7/27Sat
nonstopUnited Airlines
2h 18mDEN-ONT
$120

Search by stops

Search by airline

Search by price

Last minute flights from Worldwide to Ontario

Last minute flight, train and bus deals

5/2Thu
nonstopFrontier
1h 29mSFO-ONT
5/4Sat
nonstopFrontier
1h 28mONT-SFO
$89
5/1Wed
nonstopFrontier
1h 29mSFO-ONT
5/15Wed
nonstopFrontier
1h 27mONT-SFO
$90
5/2Thu
nonstop
2h 33mSEA-ONT
5/7Tue
multi-stop
12h 07mONT-SEA
$263
5/2Thu
nonstopDelta
1h 49mSLC-ONT
5/4Sat
nonstopDelta
1h 44mONT-SLC
$264
5/2Thu
multi-stopAmerican Airlines
10h 17mLGA-ONT
5/6Mon
multi-stopAmerican Airlines
8h 35mONT-LGA
$274
5/2Thu
multi-stopAmerican Airlines
8h 52mJFK-ONT
5/4Sat
multi-stopAmerican Airlines
7h 50mONT-JFK
$274
5/1Wed
multi-stopDelta
8h 32mJFK-ONT
5/4Sat
multi-stopDelta
10h 46mONT-JFK
$276
5/1Wed
multi-stop
12h 28mSEA-ONT
5/6Mon
nonstop
2h 45mONT-SEA
$303
5/2Thu
multi-stopAlaska Airlines
12h 34mJFK-ONT
5/13Mon
multi-stopAlaska Airlines
9h 00mONT-JFK
$367
5/2Thu
multi-stopAlaska Airlines
10h 19mJFK-ONT
5/8Wed
multi-stopAlaska Airlines
11h 59mONT-JFK
$370

Search by stops

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Worldwide

Cabin classes:

$343
$478
$193
$29