Which airports can I use when flying from Ontario to London Heathrow Airport?

Flights from Ontario to London Heathrow Airport usually depart from Ontario (ONT) and arrive at London Heathrow (LHR).

What cabin classes can I book on flights from Ontario to London Heathrow Airport?

Three cabin classes are available on flights from Ontario to London Heathrow Airport: • Economy Class • Premium Economy Class • First Class

Which airports do connecting flights from Ontario to London Heathrow Airport pass through?

One-stop flights from Ontario to London Heathrow Airport most commonly connect through: • Dallas/Fort Worth (DFW) - 30% of one-stop connections • Seattle/Tacoma Intl (SEA) - 24% of one-stop connections • Denver Intl (DEN) - 22% of one-stop connections • Phoenix Sky Harbor Intl (PHX) - 14% of one-stop connections

Can I save money by using flexible dates for flights from Ontario to London Heathrow Airport?

Yes. Flexible dates can save you up to 32% on flights from Ontario to London Heathrow Airport. Thursday is the cheapest departure day at $652 round-trip on average, while Wednesday is the most expensive at $956, a difference of $304. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in London Heathrow Airport?

Some of the most popular sights in London Heathrow Airport are Hyde Park and Buckingham Palace. These are among the most viewed places in London Heathrow Airport on KAYAK.

How long is a flight from Ontario to London Heathrow Airport?

A nonstop flight from Ontario to London Heathrow Airport takes 00m, covering 5,407 miles.

Do I need a passport to fly from Ontario to London Heathrow Airport?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

How are flight prices from Ontario to London Heathrow Airport looking right now?

One-way fares from Ontario to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about $321, which is 49% below the typical average for this route.

How much time can I save by choosing a different layover airport from Ontario to London Heathrow Airport?

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 13h 05m, compared with 13h 16m via Denver Intl (DEN) and 13h 28m via Phoenix Sky Harbor Intl (PHX).

What is the time difference between Ontario and London Heathrow Airport?

London Heathrow Airport is 8 hours ahead of Ontario (British Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at London Heathrow Airport (LHR)?

London Heathrow Airport (LHR) hosts 5 major car rental companies, with daily rates starting from around $7 for economy cars. Top options include: • GREEN MOTION • DRIVALIA • Europcar • Alamo • Hertz

How much should I expect to pay for a Ontario to London Heathrow Airport flight?

Round-trip flights from Ontario to London Heathrow Airport range from $686 to $1,179, with an average of $893 over the past 12 months. Anything below $686 counts as a good deal.

How much is a round-trip flight from Ontario to London Heathrow Airport?

Round-trip flights from Ontario to London Heathrow Airport typically range from $686 to $1,179. The lowest price found in the past 5 days was $751, on United Airlines.

What's the cheapest day of the week to fly from Ontario to London Heathrow Airport?

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Ontario to London Heathrow Airport. It’s 27% cheaper than the average day, while Wednesday is the most expensive, with prices 7% higher.

What’s the cheapest month to fly from Ontario to London Heathrow Airport?

•June is the cheapest month to fly from Ontario to London Heathrow Airport at $530 round-trip. •July ($1,327) and January ($1,267) are the most expensive months. •The price difference between flying in the cheapest and most expensive months is 150% on average. This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Which airline is the cheapest to fly from Ontario to London Heathrow Airport?

United Airlines ($751) and Alaska Airlines ($800) are the cheapest airlines to fly round-trip from Ontario to London Heathrow Airport according to KAYAK data over the last 5 days.

What’s the most popular layover airport when flying from Ontario to London Heathrow Airport?

Dallas/Fort Worth (DFW) is the most popular layover for the Ontario to London Heathrow Airport route. 30% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via DFW.

What is the cheapest layover airport when flying from Ontario to London Heathrow Airport?

Flights via Phoenix Sky Harbor Intl (PHX) offer the most affordable fares, with an average round-trip price of $916. Based on KAYAK data over the past 3 months.

When flying from Ontario to London Heathrow Airport which airport offers the shortest layover?

Salt Lake City (SLC) had the shortest average connection time for Ontario to London Heathrow Airport layovers at 6h 59m over the past 3 months.

$313 CHEAP FLIGHTS from Ontario to London Heathrow (ONT - LHR)

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$751

Typical prices: $686-$1,179

United Airlines

Fri 3/2Mon 3/5

ONT - LHR • 1 stop

Cheapest one-way

$311

Typical prices: $482-$688

Air Canada

Wed 1/24

ONT - LHR • 2 stops

Nonstop flights

Not available

There are currently no direct flights between Ontario and London Heathrow Airport. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

June

Cheapest • 41% price drop

July

Most popular

Good to know

Top layover airports

Phoenix Sky Harbor Intl (PHX)

Cheapest • Avg $916 (round-trip)

Salt Lake City (SLC)

Shortest trip • 13h 05m (one-way)

Insights

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KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to London Heathrow Airport!

Cheap Flights from Ontario to London (ONT-LHR)

Cheap flights from Ontario to London with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Tue, Mar 2 - Fri, Mar 5

4:03 pm - 11:15 amONT Ontario-LHR London Heathrow

35h 12m1 stop San Francisco

6:50 am - 10:15 pmLHR London Heathrow-ONT Ontario

23h 25m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$751United Airlines

Tue, Mar 2 - Fri, Mar 5

6:35 pm - 7:25 amONT Ontario-LHR London Heathrow

28h 50m1 stop San Francisco

6:50 am - 6:44 pmLHR London Heathrow-ONT Ontario

19h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$751United Airlines

Wed, Mar 3 - Wed, Mar 17

12:49 pm - 10:00 amONT Ontario-LHR London Heathrow

13h 11m1 stop Dallas/Fort Worth

2:45 pm - 10:39 pmLHR London Heathrow-ONT Ontario

14h 54m1 stop Seattle/Tacoma Intl

$794Multiple Airlines

Wed, Jan 27 - Sun, Jan 31

9:45 am - 11:50 amONT Ontario-LHR London Heathrow

18h 05m2 stops San Francisco Vancouver Intl

2:45 pm - 10:38 amLHR London Heathrow-ONT Ontario

27h 53m1 stop Seattle/Tacoma Intl

$794Multiple Airlines

Sat, Jan 23 - Mon, Feb 8

4:16 pm - 12:20 pmONT Ontario-LHR London Heathrow

36h 04m1 stop Seattle/Tacoma Intl

2:45 pm - 10:41 pmLHR London Heathrow-ONT Ontario

15h 56m1 stop Seattle/Tacoma Intl

$800Alaska Airlines

Wed, Jan 20 - Wed, Jan 27

11:36 am - 12:20 pmONT Ontario-LHR London Heathrow

16h 44m1 stop Seattle/Tacoma Intl

2:45 pm - 10:41 pmLHR London Heathrow-ONT Ontario

15h 56m1 stop Seattle/Tacoma Intl

$803Alaska Airlines

Tue, Feb 16 - Tue, Feb 23

1:00 pm - 10:00 amONT Ontario-LHR London Heathrow

13h 00m1 stop Salt Lake City

5:50 pm - 4:12 pmLHR London Heathrow-ONT Ontario

30h 22m2 stops Amsterdam Schiphol Salt Lake City

$851Virgin Atlantic

Sun, Jan 24 - Wed, Feb 3

12:00 pm - 9:00 amONT Ontario-LHR London Heathrow

13h 00m1 stop Atlanta Hartsfield-Jackson

6:30 am - 10:14 pmLHR London Heathrow-ONT Ontario

23h 44m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$875Delta

Mon, Jan 18 - Wed, Feb 3

12:00 pm - 9:00 amONT Ontario-LHR London Heathrow

13h 00m1 stop Atlanta Hartsfield-Jackson

6:30 am - 10:14 pmLHR London Heathrow-ONT Ontario

23h 44m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$875Delta

Tue, Mar 9 - Wed, Apr 14

1:00 pm - 10:00 amONT Ontario-LHR London Heathrow

13h 00m1 stop Salt Lake City

10:55 am - 4:12 pmLHR London Heathrow-ONT Ontario

13h 17m1 stop Salt Lake City

$888Virgin Atlantic

Wed, Oct 21 - Wed, Oct 28

9:45 am - 11:20 amONT Ontario-LHR London Heathrow

17h 35m2 stops Salt Lake City Seattle/Tacoma Intl

9:50 am - 11:55 pmLHR London Heathrow-ONT Ontario

21h 05m2 stops Minneapolis St Paul Salt Lake City

$989Virgin Atlantic

Wed, Oct 21 - Wed, Oct 28

9:45 am - 11:20 amONT Ontario-LHR London Heathrow

17h 35m2 stops Salt Lake City Seattle/Tacoma Intl

9:40 am - 11:55 pmLHR London Heathrow-ONT Ontario

21h 15m2 stops Boston Logan Intl Salt Lake City

$992Virgin Atlantic

Wed, Oct 21 - Wed, Oct 28

2:13 pm - 3:05 pmONT Ontario-LHR London Heathrow

16h 52m1 stop Seattle/Tacoma Intl

2:45 pm - 6:00 pmLHR London Heathrow-ONT Ontario

34h 15m1 stop Seattle/Tacoma Intl

$999Alaska Airlines

Fri, Oct 23 - Fri, Oct 30

1:52 pm - 1:20 pmONT Ontario-LHR London Heathrow

15h 28m2 stops San Francisco Vancouver Intl

2:30 pm - 12:29 pmLHR London Heathrow-ONT Ontario

28h 59m2 stops Vancouver Intl San Francisco

$1,006Air Canada

Sun, Oct 25 - Thu, Nov 5

6:02 am - 12:20 pmONT Ontario-LHR London Heathrow

23h 18m1 stop Seattle/Tacoma Intl

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

$1,016Alaska Airlines

Wed, Oct 21 - Wed, Oct 28

2:22 pm - 12:50 pmONT Ontario-LHR London Heathrow

14h 28m1 stop Dallas/Fort Worth

11:50 am - 9:11 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Dallas/Fort Worth

$1,028Iberia

Fri, Oct 23 - Fri, Oct 30

1:24 pm - 9:40 amONT Ontario-LHR London Heathrow

12h 16m1 stop Denver Intl

10:25 am - 6:47 pmLHR London Heathrow-ONT Ontario

15h 22m1 stop Chicago O'Hare Intl

$1,066United Airlines

Wed, Oct 21 - Mon, Oct 26

8:03 am - 7:25 amONT Ontario-LHR London Heathrow

15h 22m1 stop San Francisco

12:05 pm - 9:40 pmLHR London Heathrow-ONT Ontario

16h 35m1 stop Houston George Bush Intcntl

$1,066United Airlines

Fri, Oct 23 - Fri, Oct 30

1:05 pm - 10:30 amONT Ontario-LHR London Heathrow

13h 25m1 stop Phoenix Sky Harbor Intl

1:50 pm - 10:59 pmLHR London Heathrow-ONT Ontario

16h 09m1 stop Charlotte Douglas

$1,072British Airways

Fri, Oct 23 - Fri, Oct 30

1:05 pm - 10:30 amONT Ontario-LHR London Heathrow

13h 25m1 stop Phoenix Sky Harbor Intl

2:25 pm - 10:53 pmLHR London Heathrow-ONT Ontario

15h 28m1 stop Phoenix Sky Harbor Intl

$1,525British Airways

Price, demand and travel trends for Ontario to London Heathrow Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Ontario to London Heathrow Airport? This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to London Heathrow Airport departing in march.
What's the cheapest day of the week to fly from Ontario to London Heathrow Airport?: Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Ontario to London Heathrow Airport. It’s 27% cheaper than the average day, while Wednesday is the most expensive, with prices 7% higher.
What’s the cheapest month to fly from Ontario to London Heathrow Airport? KAYAK internal proprietary data takes all prices for each month over the last 12 months for round-trip flights from Ontario to London Heathrow Airport, removes the top 0.1% to account for outliers and then takes the median of all values for each month.: •June is the cheapest month to fly from Ontario to London Heathrow Airport at $530 round-trip.
•July ($1,327) and January ($1,267) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 150% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Low season	February
High season	July
Cheapest flight	$311

Beat the crowds with an average 50% drop in travelers.

The most popular month to fly with an average 79% increase in travelers.

One-way flight from Ontario to London Heathrow Airport

When to book flights from Ontario to London

Are your dates flexible? Find out the best times to travel from Ontario to London based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What cabin classes can I book on flights from Ontario to London Heathrow Airport?
Three cabin classes are available on flights from Ontario to London Heathrow Airport:

• Economy Class
• Premium Economy Class
• First Class
How long is a flight from Ontario to London Heathrow Airport?
A nonstop flight from Ontario to London Heathrow Airport takes 00m, covering 5,407 miles.
Do I need a passport to fly from Ontario to London Heathrow Airport?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a Ontario to London Heathrow Airport flight?
Round-trip flights from Ontario to London Heathrow Airport range from $686 to $1,179, with an average of $893 over the past 12 months. Anything below $686 counts as a good deal.
How are flight prices from Ontario to London Heathrow Airport looking right now?
One-way fares from Ontario to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about $321, which is 49% below the typical average for this route.
What car rental options are available at London Heathrow Airport (LHR)?
London Heathrow Airport (LHR) hosts 5 major car rental companies, with daily rates starting from around $7 for economy cars. Top options include:

• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• Hertz
Which airports can I use when flying from Ontario to London Heathrow Airport?
Flights from Ontario to London Heathrow Airport usually depart from Ontario (ONT) and arrive at London Heathrow (LHR).
Which airports do connecting flights from Ontario to London Heathrow Airport pass through?
One-stop flights from Ontario to London Heathrow Airport most commonly connect through:

• Dallas/Fort Worth (DFW) - 30% of one-stop connections
• Seattle/Tacoma Intl (SEA) - 24% of one-stop connections
• Denver Intl (DEN) - 22% of one-stop connections
• Phoenix Sky Harbor Intl (PHX) - 14% of one-stop connections
Can I save money by using flexible dates for flights from Ontario to London Heathrow Airport?
Yes. Flexible dates can save you up to 32% on flights from Ontario to London Heathrow Airport. Thursday is the cheapest departure day at $652 round-trip on average, while Wednesday is the most expensive at $956, a difference of $304.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
How much time can I save by choosing a different layover airport from Ontario to London Heathrow Airport?
Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 13h 05m, compared with 13h 16m via Denver Intl (DEN) and 13h 28m via Phoenix Sky Harbor Intl (PHX).
What is the time difference between Ontario and London Heathrow Airport?
London Heathrow Airport is 8 hours ahead of Ontario (British Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in London Heathrow Airport?
Some of the most popular sights in London Heathrow Airport are Hyde Park and Buckingham Palace. These are among the most viewed places in London Heathrow Airport on KAYAK.

If your dates are flexible, aim for a Thursday departure and avoid flying on Wednesday. On this route, Thursday flights average $652, about $304 less than Wednesday fares (32% savings) based on the last 12 months.
If you can choose when to travel, plan your Ontario to London Heathrow Airport trip for June. Fares historically average $530 round-trip in that month - typically $797 less than the most expensive month, which is July (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to London Heathrow Airport.

• Hilton London Heathrow Airport

More options for your flight from Ontario to London

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ONT - LHR

$313 Find Cheap Flights from Ontario to London Heathrow Airport - Compare and Save

Everything you should know

Cheap Flights from Ontario to London (ONT-LHR)

Cheap flights from Ontario to London with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Price, demand and travel trends for Ontario to London Heathrow Airport flights

How much is a round-trip flight from Ontario to London Heathrow Airport?

What's the cheapest day of the week to fly from Ontario to London Heathrow Airport?

What’s the cheapest month to fly from Ontario to London Heathrow Airport?

Which airline is the cheapest to fly from Ontario to London Heathrow Airport?

What’s the most popular layover airport when flying from Ontario to London Heathrow Airport?

What is the cheapest layover airport when flying from Ontario to London Heathrow Airport?

When flying from Ontario to London Heathrow Airport which airport offers the shortest layover?

Key details for Ontario to London Heathrow Airport flights

Low season

High season

Cheapest flight

When to book flights from Ontario to London

Your Ontario to London Heathrow Airport flight questions, answered

Your guide to booking Ontario to London Heathrow Airport flights

More options for your flight from Ontario to London

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

Information on your arrival and departure airports

Cabin class types available on flights to London

Find direct flights to and from Ontario and London

Flights from domestic origins to London

Choose which airport to fly into in Ontario

Flights to other popular destinations

Find deals for your return flight