How does KAYAK find such low prices on flights from Europe 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 Europe to Ontario.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Europe 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 Europe 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 Europe with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Europe 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 Europe up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$383 CHEAP FLIGHTS from Europe to Ontario

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Cheap Flights from Europe to Ontario

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Europe to Ontario

Wed, Oct 14 - Wed, Nov 18

7:15 pm - 10:43 pmLHR London Heathrow-ONT Ontario

35h 28m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

12:22 pm - 6:25 amONT Ontario-LHR London Heathrow

34h 03m1 stop Atlanta Hartsfield-Jackson

$578Virgin Atlantic

Wed, Oct 14 - Wed, Nov 18

7:15 pm - 10:43 pmLHR London Heathrow-ONT Ontario

35h 28m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

6:00 am - 10:30 amONT Ontario-LHR London Heathrow

20h 30m2 stops Salt Lake City New York John F Kennedy Intl

$578Virgin Atlantic

Thu, Sep 10 - Sun, Sep 13

2:20 pm - 11:47 amMXP Milan Malpensa-ONT Ontario

30h 27m2 stops Philadelphia Dallas/Fort Worth

2:22 pm - 11:35 pmONT Ontario-MXP Milan Malpensa

24h 13m2 stops Dallas/Fort Worth London Heathrow

$580American Airlines

Thu, Sep 10 - Sun, Sep 13

2:20 pm - 11:47 amMXP Milan Malpensa-ONT Ontario

30h 27m2 stops Philadelphia Dallas/Fort Worth

2:22 pm - 11:35 pmONT Ontario-MXP Milan Malpensa

24h 13m2 stops Dallas/Fort Worth London Heathrow

$581American Airlines

Mon, Sep 28 - Mon, Oct 5

9:20 am - 6:07 pmLHR London Heathrow-ONT Ontario

16h 47m1 stop Atlanta Hartsfield-Jackson

12:19 pm - 1:15 pmONT Ontario-LHR London Heathrow

16h 56m1 stop Atlanta Hartsfield-Jackson

$581KLM

Thu, Sep 10 - Thu, Sep 17

8:45 am - 8:01 pmLHR London Heathrow-ONT Ontario

19h 16m2 stops Zurich San Francisco

9:01 am - 7:25 amONT Ontario-LHR London Heathrow

14h 24m1 stop San Francisco

$582United Airlines

Thu, Sep 10 - Sun, Sep 13

2:20 pm - 11:47 amMXP Milan Malpensa-ONT Ontario

30h 27m2 stops Philadelphia Dallas/Fort Worth

2:22 pm - 11:35 pmONT Ontario-MXP Milan Malpensa

24h 13m2 stops Dallas/Fort Worth London Heathrow

$582American Airlines

Wed, Nov 18 - Thu, Nov 19

9:00 am - 8:15 pmLHR London Heathrow-ONT Ontario

19h 15m2 stops Zurich San Francisco

6:00 am - 7:40 amONT Ontario-LHR London Heathrow

17h 40m1 stop Houston George Bush Intcntl

$583United Airlines

Thu, Oct 1 - Thu, Oct 15

6:50 am - 6:53 pmFCO Rome Fiumicino-ONT Ontario

21h 03m2 stops London Heathrow Dallas/Fort Worth

12:43 pm - 4:55 pmONT Ontario-FCO Rome Fiumicino

19h 12m2 stops Dallas/Fort Worth London Heathrow

$608British Airways

Wed, Oct 7 - Thu, Oct 22

1:30 pm - 10:59 pmFCO Rome Fiumicino-ONT Ontario

18h 29m1 stop Charlotte Douglas

10:25 am - 12:05 pmONT Ontario-FCO Rome Fiumicino

16h 40m1 stop Dallas/Fort Worth

$612British Airways

Recent last minute flight deals from Europe to Ontario

Fri, Aug 21 - Sun, Aug 23

3:20 pm - 10:35 pmMXP Milan Malpensa-ONT Ontario

16h 15m1 stop Chicago O'Hare Intl

7:00 am - 1:20 pmONT Ontario-MXP Milan Malpensa

21h 20m1 stop Chicago O'Hare Intl

$648United Airlines

Wed, Aug 19 - Wed, Sep 2

12:55 pm - 6:16 pmFRA Frankfurt am Main-ONT Ontario

14h 21m1 stop San Francisco

7:00 am - 9:55 amONT Ontario-FRA Frankfurt am Main

17h 55m1 stop Chicago O'Hare Intl

$674United Airlines

Tue, Aug 18 - Sat, Sep 5

11:20 am - 8:53 pmFRA Frankfurt am Main-ONT Ontario

18h 33m1 stop Denver Intl

1:18 pm - 9:20 amONT Ontario-FRA Frankfurt am Main

35h 02m1 stop Denver Intl

$675United Airlines

Thu, Aug 20 - Wed, Sep 16

1:55 pm - 9:59 pmFRA Frankfurt am Main-ONT Ontario

17h 04m1 stop Houston George Bush Intcntl

7:00 am - 6:30 amONT Ontario-FRA Frankfurt am Main

14h 30m1 stop Chicago O'Hare Intl

$676United Airlines

Sat, Aug 22 - Mon, Sep 14

2:20 pm - 8:53 pmFCO Rome Fiumicino-ONT Ontario

15h 33m1 stop Denver Intl

7:00 am - 7:55 amONT Ontario-FCO Rome Fiumicino

15h 55m1 stop Chicago O'Hare Intl

$677United Airlines

Thu, Aug 20 - Sat, Aug 29

11:20 am - 8:53 pmFRA Frankfurt am Main-ONT Ontario

18h 33m1 stop Denver Intl

11:00 am - 9:45 amONT Ontario-FRA Frankfurt am Main

13h 45m1 stop San Francisco

$683United Airlines

Thu, Aug 20 - Sat, Aug 29

12:40 pm - 10:35 pmFRA Frankfurt am Main-ONT Ontario

18h 55m1 stop Chicago O'Hare Intl

5:00 am - 9:20 amONT Ontario-FRA Frankfurt am Main

19h 20m1 stop Denver Intl

$684United Airlines

Thu, Aug 20 - Sat, Aug 29

11:20 am - 8:53 pmFRA Frankfurt am Main-ONT Ontario

18h 33m1 stop Denver Intl

1:18 pm - 10:05 amONT Ontario-FRA Frankfurt am Main

35h 47m2 stops Denver Intl London Heathrow

$686United Airlines

Fri, Aug 21 - Tue, Sep 1

10:55 am - 6:47 pmFRA Frankfurt am Main-ONT Ontario

16h 52m1 stop Dallas/Fort Worth

7:05 am - 8:45 amONT Ontario-FRA Frankfurt am Main

16h 40m1 stop Dallas/Fort Worth

$690British Airways

Fri, Aug 21 - Sun, Sep 6

1:10 pm - 10:59 pmFCO Rome Fiumicino-ONT Ontario

18h 49m1 stop Dallas/Fort Worth

10:29 am - 12:05 pmONT Ontario-FCO Rome Fiumicino

16h 36m1 stop Dallas/Fort Worth

$850British Airways

Useful Info

Low season	January
High season	June

Best time to beat the crowds with an average 9% drop in price.

Most popular time to fly with an average 26% increase in price.

How does KAYAK find such low prices on flights from Europe 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 Europe to Ontario.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Europe to Ontario?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Europe 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 Europe 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 Europe with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Europe 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 Europe up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ontario

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Information on the airport you'll fly into in Ontario

Ontario (ONT)

$383 Find Cheap Flights from Europe to Ontario - Compare and Save

Cheap Flights from Europe to Ontario

Recent round-trip flight deals from Europe to Ontario

Recent one-way flight deals from Europe to Ontario

Recent last minute flight deals from Europe to Ontario

Good to know

Low season

High season

FAQs for booking flights from Europe to Ontario

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Cabin class types available on flights to Europe

Complete your trip to Ontario with a hotel stay or car rental

Find direct flights for Ontario

Flights to other popular destinations

Flights from domestic origins to Europe

Choose which airport to fly into in Ontario

Find deals for your return flight