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Cheap flights from Ottawa to London from C$ 326

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to London departing on 14/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ottawa to London

Cheap round-trip flights

Multiple Airlines Logo
11:55 a.m. - 2:20 p.m.YOW-STN
21h 25m2 stops
Multiple Airlines Logo
10:00 p.m. - 5:04 p.m.STN-YOW
24h 04m2 stops
C$ 879Multiple Airlines
Find Deal
Tue, 14 Oct - Mon, 20 Oct
Multiple Airlines Logo
7:00 a.m. - 2:20 p.m.YOW-STN
26h 20m2 stops
Multiple Airlines Logo
10:05 p.m. - 8:05 p.m.STN-YOW
27h 00m3 stops
C$ 968Multiple Airlines
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Multiple Airlines Logo
2:20 p.m. - 2:20 p.m.YOW-STN
19h 00m2 stops
Multiple Airlines Logo
10:05 p.m. - 8:05 p.m.STN-YOW
27h 00m3 stops
C$ 971Multiple Airlines
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Multiple Airlines Logo
10:45 a.m. - 6:10 p.m.YOW-STN
26h 25m2 stops
Multiple Airlines Logo
10:05 p.m. - 8:05 p.m.STN-YOW
27h 00m3 stops
C$ 974Multiple Airlines
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Multiple Airlines Logo
10:30 a.m. - 11:25 a.m.YOW-STN
19h 55m3 stops
Multiple Airlines Logo
10:20 p.m. - 8:17 p.m.STN-YOW
26h 57m3 stops
C$ 1,053Multiple Airlines
Find Deal
Fri, 10 Oct - Fri, 17 Oct
Multiple Airlines Logo
6:20 p.m. - 6:30 p.m.YOW-STN
20h 10m2 stops
Multiple Airlines Logo
8:15 a.m. - 12:42 a.m.STN-YOW
21h 27m3 stops
C$ 1,064Multiple Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Multiple Airlines Logo
9:05 a.m. - 8:00 p.m.YOW-STN
29h 55m2 stops
Multiple Airlines Logo
7:40 a.m. - 12:22 p.m.STN-YOW
32h 42m2 stops
C$ 1,097Multiple Airlines
Find Deal
Wed, 22 Oct - Wed, 29 Oct
Multiple Airlines Logo
7:50 p.m. - 2:20 p.m.YOW-STN
13h 30m2 stops
Multiple Airlines Logo
10:05 p.m. - 8:05 p.m.STN-YOW
27h 00m3 stops
C$ 1,152Multiple Airlines
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Multiple Airlines Logo
5:45 a.m. - 7:40 p.m.YOW-STN
33h 55m3 stops
Multiple Airlines Logo
8:40 p.m. - 7:18 p.m.STN-YOW
27h 38m3 stops
C$ 1,158Multiple Airlines
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Multiple Airlines Logo
5:55 a.m. - 4:20 p.m.YOW-STN
29h 25m3 stops
Multiple Airlines Logo
6:30 a.m. - 7:12 p.m.STN-YOW
40h 42m3 stops
C$ 1,159Multiple Airlines
Find Deal
Wed, 8 Oct - Wed, 29 Oct

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to London Stansted Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 16 September 2025.
Use the filters below to find and compare flights from Ottawa to London Stansted Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Tue 14/10

11:55 a.m.-2:20 p.m.

2 stops21h 25m

London Stansted

Mon 20/10

10:00 p.m.-5:04 p.m.

2 stops24h 04m

C$ 879

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Tue 14/10

7:00 a.m.-2:20 p.m.

2 stops26h 20m

London Stansted

Tue 21/10

10:05 p.m.-8:05 p.m.

3 stops27h 00m

C$ 968

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Tue 14/10

2:20 p.m.-2:20 p.m.

2 stops19h 00m

London Stansted

Tue 21/10

10:05 p.m.-8:05 p.m.

3 stops27h 00m

C$ 971

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Tue 14/10

10:45 a.m.-6:10 p.m.

2 stops26h 25m

London Stansted

Tue 21/10

10:05 p.m.-8:05 p.m.

3 stops27h 00m

C$ 974

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Fri 10/10

10:30 a.m.-11:25 a.m.

3 stops19h 55m

London Stansted

Fri 17/10

10:20 p.m.-8:17 p.m.

3 stops26h 57m

C$ 1,053

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Thu 30/10

6:20 p.m.-6:30 p.m.

2 stops20h 10m

London Stansted

Thu 6/11

8:15 a.m.-12:42 a.m.

3 stops21h 27m

C$ 1,064

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Wed 22/10

9:05 a.m.-8:00 p.m.

2 stops29h 55m

London Stansted

Wed 29/10

7:40 a.m.-12:22 p.m.

2 stops32h 42m

C$ 1,097

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Tue 14/10

7:50 p.m.-2:20 p.m.

2 stops13h 30m

London Stansted

Tue 21/10

10:05 p.m.-8:05 p.m.

3 stops27h 00m

C$ 1,152

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Wed 29/10

5:45 a.m.-7:40 p.m.

3 stops33h 55m

London Stansted

Wed 5/11

8:40 p.m.-7:18 p.m.

3 stops27h 38m

C$ 1,158

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Wed 8/10

5:55 a.m.-4:20 p.m.

3 stops29h 25m

London Stansted

Wed 29/10

6:30 a.m.-7:12 p.m.

3 stops40h 42m

C$ 1,159

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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When to book flights from Ottawa to London Stansted Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to London Stansted Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ottawa to London Stansted Airport (YOW to STN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to London Stansted Airport

Direct flights

None
There are no direct flights from Ottawa to London Stansted Airport. There are no popular flight routes from Ottawa to London Stansted Airport.
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  • How far is Ottawa to London Stansted by plane?

    There are 5363.2 km between Ottawa and London Stansted. A reasonable flight in good conditions will take 13h 30m.

  • When did momondo last update prices for flights from Ottawa Airport to London Stansted Airport?

    Prices for flights from Ottawa Airport to London Stansted Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Ottawa Airport to London Stansted Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to London Stansted Airport.

  • What documentation or ID do you need to fly to London Stansted Airport?

    The travel and health documents you'll need for your trip to London Stansted Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Stansted Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Ottawa to London Stansted Airport?

    Confirm your travel details to search for the latest offers for flights from Ottawa to London Stansted Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Ottawa to London Stansted Airport with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Ipswich
Dartford
Gatwick
Ilford
Wembley
Maidstone
Chelmsford
Wokingham
Slough
Canterbury
Feltham
Hayes
Uxbridge
Waterlooville
Newport
Basingstoke
Milton Keynes
Dover
Worthing

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to London?

It is quick and easy to find Ottawa to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from Ottawa to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ottawa to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Ottawa to London?

Once you have performed a search for Ottawa to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ottawa to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ottawa to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London Stansted Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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