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Cheap flights from St. Louis to London, Ontario from C$ 946

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to London, Ontario departing on 31/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from St. Louis to London

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to London.
United Airlines Logo
7:30 a.m. - 3:03 p.m.STL-YXU
6h 33m1 stop
United Airlines Logo
6:15 a.m. - 8:48 p.m.YXU-STL
15h 33m2 stops
C$ 946United Airlines
Find Deal
Sat, 31 May - Sat, 7 Jun
United Airlines Logo
7:30 a.m. - 3:03 p.m.STL-YXU
6h 33m1 stop
United Airlines Logo
3:35 p.m. - 7:43 p.m.YXU-STL
5h 08m1 stop
C$ 975United Airlines
Find Deal
Sat, 31 May - Sat, 7 Jun
United Airlines Logo
8:05 a.m. - 9:18 a.m.STL-YXU
24h 13m2 stops
United Airlines Logo
6:15 a.m. - 8:48 p.m.YXU-STL
15h 33m2 stops
C$ 991United Airlines
Find Deal
Sat, 31 May - Sat, 7 Jun

United Airlines flights from St. Louis to London, Ontario

Our best United Airlines deals on St. Louis to London, Ontario flight tickets
United Airlines
31 May
STL7:30 a.m.Lambert-St Louis
6h 33m
1 stop
YXU3:03 p.m.London
7 Jun
YXU6:15 a.m.London
15h 33m
2 stops
STL8:48 p.m.Lambert-St Louis
United Airlines
31 May
STL7:30 a.m.Lambert-St Louis
6h 33m
1 stop
YXU3:03 p.m.London
7 Jun
YXU3:35 p.m.London
5h 08m
1 stop
STL7:43 p.m.Lambert-St Louis
United Airlines
31 May
STL8:05 a.m.Lambert-St Louis
24h 13m
2 stops
YXU9:18 a.m.London
7 Jun
YXU6:15 a.m.London
15h 33m
2 stops
STL8:48 p.m.Lambert-St Louis

When to book flights from St. Louis to London, Ontario

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

Cheap St. Louis to London, Ontario (STL to YXU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to London, Ontario

Best price found

C$ 946

Fastest flight time

6h 33m

Direct flights

None

Airports in London, Ontario

1 airport
The best flight deal from St. Louis to London, Ontario found on momondo in the last 72 hours is C$ 946
The fastest flight from St. Louis to London, Ontario takes 6h 33m
There are no direct flights from St. Louis to London, Ontario. Popular non-direct route for this connection is Lambert-St Louis Airport - London Airport.
There is 1 airport near London, Ontario: London (YXU)

  • How far is Lambert-St Louis to London by plane?

    London is 895.2 km away from Lambert-St Louis. In terms of flight time, this usually takes a little over 6h 33m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to London Airport?

    Prices for flights from Lambert-St Louis Airport to London Airport are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to London Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to London Airport.

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

    The necessary travel and health documents for your London Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.


  • How do I get Price Alerts for flights from St. Louis to London, Ontario?

    Price Alerts will notify you by email when the price for flights to London, Ontario from St. Louis decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from St. Louis to London, Ontario 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?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.


Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend
Port Stanley

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to London. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to London with flexible booking policies on momondo?

All flight searches from St. Louis to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to London?

Once all potential St. Louis to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from St. Louis and alert you when they change.


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