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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 6/21. 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
mar. 7/2
mar. 7/9

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In the last 7 days travelers have searched 41,909,192 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 San Francisco 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

6/12mié.
nonstopFrontier
1h 23mSFO-ONT
6/12mié.
nonstopFrontier
1h 28mONT-SFO
$56
6/13jue.
nonstopFrontier
2h 20mDEN-ONT
6/14vie.
nonstopFrontier
2h 20mONT-DEN
$56
8/15jue.
nonstop
2h 37mSEA-ONT
8/21mié.
nonstop
2h 45mONT-SEA
$143
6/25mar.
1 stop
6h 14mPDX-ONT
6/27jue.
nonstop
2h 15mONT-PDX
$152
7/2mar.
nonstopAlaska Airlines
2h 33mSEA-ONT
7/9mar.
nonstopAlaska Airlines
2h 35mONT-SEA
$157
7/3mié.
1 stopDelta
6h 48mSEA-ONT
7/10mié.
nonstopDelta
2h 46mONT-SEA
$167
7/10mié.
nonstopAlaska Airlines
2h 33mSEA-ONT
7/16mar.
1 stopAlaska Airlines
5h 32mONT-SEA
$186
7/26vie.
1 stopDelta
6h 45mSEA-ONT
7/30mar.
nonstopDelta
2h 46mONT-SEA
$187
8/23vie.
1 stopUnited Airlines
4h 42mDEN-ONT
8/25dom.
nonstopUnited Airlines
2h 18mONT-DEN
$187
7/2mar.
nonstopUnited Airlines
1h 27mSFO-ONT
7/9mar.
nonstopUnited Airlines
1h 20mONT-SFO
$213

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Recent one-way flight deals

6/21vie.
nonstopFrontier
1h 23mSFO-ONT
$39
8/7mié.
nonstopFrontier
2h 20mPDX-ONT
$39
7/3mié.
1 stopDelta
6h 48mSEA-ONT
$88
7/1lun.
nonstopAmerican Airlines
3h 03mDFW-ONT
$95
7/5vie.
1 stopDelta
6h 05mDEN-ONT
$98
6/25mar.
1 stopAlaska Airlines
6h 14mPDX-ONT
$98
11/2sáb.
1 stopAmerican Airlines
6h 50mORD-ONT
$99
8/17sáb.
nonstopAlaska Airlines
2h 35mSEA-ONT
$99
7/2mar.
1 stopUnited Airlines
7h 24mDFW-ONT
$104
7/2mar.
1 stopUnited Airlines
4h 48mSEA-ONT
$113

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Search by airline

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Last minute flights from Worldwide to Ontario

Last minute flight, train and bus deals

6/5mié.
nonstopFrontier
1h 23mSFO-ONT
6/12mié.
nonstopFrontier
1h 28mONT-SFO
$76
6/5mié.
nonstopFrontier
1h 23mSFO-ONT
6/11mar.
nonstopFrontier
1h 28mONT-SFO
$78
6/7vie.
nonstop
2h 32mSEA-ONT
6/10lun.
nonstop
2h 53mONT-SEA
$259
6/5mié.
multi-stopAmerican Airlines
8h 54mORD-ONT
6/11mar.
multi-stopAmerican Airlines
7h 58mONT-ORD
$260
6/7vie.
multi-stopAmerican Airlines
11h 09mJFK-ONT
8/13mar.
multi-stopAmerican Airlines
10h 30mONT-JFK
$281
6/5mié.
multi-stopDelta
4h 57mPDX-ONT
6/8sáb.
multi-stopDelta
5h 15mONT-PDX
$330
6/6jue.
multi-stopUnited Airlines
6h 33mPDX-ONT
6/11mar.
multi-stopUnited Airlines
6h 15mONT-PDX
$360
6/3lun.
multi-stopDelta
10h 18mJFK-ONT
6/14vie.
multi-stopDelta
7h 46mONT-JFK
$362
6/4mar.
multi-stopUnited Airlines
12h 53mPDX-ONT
6/5mié.
multi-stopUnited Airlines
4h 33mONT-PDX
$369
6/6jue.
nonstop
2h 15mPDX-ONT
6/11mar.
nonstop
2h 15mONT-PDX
$433

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Worldwide

Cabin classes:

$443
$478
$193
$35