Cheap flights from Ontario to London (ONT-LHR) - From $181

Good to Know: Cheapest and Fastest ONT - LHR Flights

Useful information for finding best airline tickets from Ontario International to London Heathrow on your next trip.

Cheapest Round Trip Flight

$181

Alaska Airlines • 1 stop • 27h 3m

Dec 10 – Dec 16

The cheapest round trip flight from Ontario to London (ONT-LHR-ONT) is currently $181

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Cheapest One way Flight

$824

United Airlines • 1 stop • 20h 18m

Oct 13

The cheapest one way flight from Ontario to London (ONT-LHR) is currently $824

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Fastest Flight

20h 18m

The fastest nonstop flight from Ontario to London (ONT-LHR) takes 20h 18m

Top Airlines Flying from Ontario to London

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

Alaska Airlines -AS

Alaska Airlines

Air France

Virgin Atlantic (VS)

Virgin Atlantic

Lufthansa Airline (LH)

Lufthansa Airlines

WestJet Airlines

WestJet Airlines

American Airlines, AA

American Airlines

Air Canada

Iberia Airlines

Latest Flight Deals from Ontario (ONT) to London (LHR)

Compare and book low fare round-trip air tickets from Ontario to London. Ideal for travelers with confirmed return itineraries.

Dec 10 - Dec 16, Economy

Ontario → London

27h 3m

11:57 AM - 12:20 PM • 1 stop

Ontario → London

47h 5m

2:45 PM - 11:10 AM • 1 stop

$181

Alaska Airlines

Dec 10 - Dec 16, Economy

Ontario → London

25h 20m

7:05 AM - 6:25 AM • 1 stop

Ontario → London

26h 58m

12:40 PM - 8:58 PM • 1 stop

$1044

KLM Airlines

Dec 10 - Dec 16, Economy

Ontario → London

27h 10m

5:00 AM - 6:30 AM • 2 stops

Ontario → London

28h 39m

10:25 AM - 6:44 PM • 1 stop

$1383

Air Canada

Dec 10 - Dec 16, Economy

Ontario → London

25h 55m

6:00 AM - 5:55 AM • 2 stops

Ontario → London

29h 16m

7:40 AM - 5:36 PM • 2 stops

$1404

United Airlines

Dec 09 - Dec 15, Economy

Ontario → London

26h 55m

7:00 AM - 8:15 AM • 1 stop

Ontario → London

28h 33m

2:45 PM - 10:58 PM • 1 stop

$1627

American Airlines

Dec 09 - Dec 15, Economy

Ontario → London

33h 35m

7:30 PM - 9:40 PM • 1 stop

Ontario → London

27h 25m

6:40 AM - 5:00 PM • 1 stop

$2012

Scandinavian Airlines

Explore competitive one-way airfare options for ONT - LHR flights. Best suited for flexible or open-ended travel plans.

Oct 13, Economy

Ontario → London

20h 18m

1:22 PM - 9:40 AM • 1 stop

$824

United Airlines

Oct 13, Economy

Ontario → London

32h 32m

11:13 AM - 3:05 PM • 1 stop

$840

Alaska Airlines

Oct 13, Economy

Ontario → London

25h 4m

12:16 PM - 11:20 AM • 1 stop

$840

Delta Airlines

Oct 13, Economy

Ontario → London

27h 32m

2:13 PM - 3:05 PM • 1 stop

$840

Alaska Airlines

Oct 13, Economy

Ontario → London

25h 18m

7:07 AM - 6:25 AM • 1 stop

$840

Delta Airlines

Oct 13, Economy

Ontario → London

41h 43m

6:02 AM - 3:05 PM • 1 stop

$857

Alaska Airlines

Flying to London soon? We've surfaced some of the most affordable last-minute flights from Ontario to London, ideal for urgent plans or spontaneous trips.

Oct 10 - Oct 16, Economy

Ontario → London

32h 32m

11:13 AM - 3:05 PM • 1 stop

Ontario → London

39h 14m

5:00 PM - 8:54 AM • 1 stop

$1885

Alaska Airlines

Oct 10 - Oct 16, Economy

Ontario → London

27h 32m

2:13 PM - 3:05 PM • 1 stop

Ontario → London

39h 14m

5:00 PM - 8:54 AM • 1 stop

$1885

Alaska Airlines

Oct 10 - Oct 16, Economy

Ontario → London

41h 43m

6:02 AM - 3:05 PM • 1 stop

Ontario → London

39h 14m

5:00 PM - 8:54 AM • 1 stop

$1917

Alaska Airlines

Fly from Ontario to London with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Ontario to London? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Ontario to London Flights

What are the airports in Ontario?

ONT

What’s the most popular airline flying from ONT to LHR?

The most popular airline flying from Ontario to London are

Can I fly from ONT to LHR non-stop?

NO

Which airlines fly nonstop between Ontario and London?

The non-stop flights between Ontario and London are .

What’s the earliest departure time from ONT to LHR Airport?

The earliest flight leaves ONT at 5:00 am and lands in LHR - London Heathrow

What are the airports in London?

LHR

Can I make changes to my Ontario to London flight tickets or cancel them on FareLeaders.com?

No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.

Can I cancel my flight tickets from ONT to LHR?

Read the fare rules of the Ontario to London air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.

Which airline alliances offer flights from Ontario and London?

operate flights between Ontario and London

How long does a flight from Ontario to London take?

It takes approximately 11 hour to fly non-stop from ONT to LHR, which is 5423.46 miles by air.

Which airlines provide the cheapest flights from Ontario (ONT) to London (LHR) ?

In the past couple of days, the cheapest tickets to LHR from ONT were found on UA : USD 824

Do I need a passport to fly between ONT and LHR?

Yes

What’s the latest departure time from ONT to LHR ?

The last flight leaves ONT at 7:30 pm

Hotels in London (LHR)

5 hotels near London Heathrow — compare rates from top booking sites.

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Coworth Park Dorchester Collection

📍 Coworth Park, Blacknest Rd., Ascot SL5 7SE

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The Bath Priory Hotel and Spa

📍 Weston Road, Bath BA1 2XT

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Burford House

📍 99 High Street, Burford OX18 4QA

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The Old Joinery

📍 8 Main Road, Calne SN11 8UU

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Four Seasons Hotel Hampshire

📍 Dogmersfield Park, Chalkey Lane,Dogmersfield Park, Hook RG27 8TD

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Hotel Deals in New London (CT)

Red Roof Inn Mystic - New London

Red Roof Inn Mystic - New London

★★☆☆☆ Hotel 107.0 rooms

📍 707 Colman Street, Building A, New London (CT), Connecticut

Great care is taken to ensure guests experience comfort through top-notch services and amenities. Remain linked during your visit by utilizing the complimentary internet access available. The hotel o…

Check-in 03:00 PM · Check-out 12:00 PM

HomeTowne Studios Mystic - New London

HomeTowne Studios Mystic - New London

★★☆☆☆ Hotel 56.0 rooms

📍 707 Colman St, Building B, New London (CT), Connecticut

Check-in 03:00 PM · Check-out 11:00 AM

Regency Inn &Suites

Regency Inn &Suites

★★☆☆☆ Hotel 1.0 rooms

✓ Free WiFi ✓ Breakfast

📍 269 N Frontage Rd, New London, New London (CT), Connecticut

King-bed room with private bath -FREE WIFI-- New London-Mystic

King-bed room with private bath -FREE WIFI-- New London-Mystic

★★★★☆

New London Hideaway Near Beaches & Local Spots!

New London Hideaway Near Beaches & Local Spots!

★★★★★

Holiday Inn New London By IHG

InterContinental Hotels Group

Holiday Inn New London By IHG

★★★☆☆ Hotel 120.0 rooms

✓ Free WiFi ✓ Breakfast

📍 35 Governor Winthrop Boulevard, New London (CT), Connecticut

Holiday Inn New London By IHG offers top-notch services and amenities, ensuring guests experience utmost comfort.Share your photos and respond to emails at your convenience, thanks to the free Wi-Fi …

Check-in 03:00 PM · Check-out 12:00 PM

Inn at Ocean Avenue

Inn at Ocean Avenue

★★★☆☆

✓ Free WiFi ✓ Breakfast

Cozy Coastal Cottage

Cozy Coastal Cottage

★★★★☆

Ontario (ONT) to London (LHR): Airport Information

Origin Airport	Ontario International , Ontario, US
Destination Airport	London Heathrow , London, GB
Distance	5423 miles

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