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.

C$ 528 Cheap Flights from St. Louis to London, Ontario in 2026

Find the cheapest flights from St. Louis to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:05 p.m. - 9:47 p.m.STL Lambert-St Louis-YXU London

4h 42m1 stop Toronto Pearson Intl

9:15 a.m. - 3:26 p.m.YXU London-STL Lambert-St Louis

7h 11m1 stop Toronto Pearson Intl

C$ 1,150Air Canada

Sat, 16 Jan - Tue, 19 Jan

2:40 p.m. - 7:40 p.m.STL Lambert-St Louis-YXU London

4h 00m1 stop Toronto Pearson Intl

3:25 p.m. - 9:40 p.m.YXU London-STL Lambert-St Louis

7h 15m2 stops Toronto Pearson Intl Chicago O'Hare Intl

C$ 1,316Air Canada

Thu, 22 Oct - Mon, 26 Oct

8:00 a.m. - 7:40 p.m.STL Lambert-St Louis-YXU London

10h 40m2 stops Chicago O'Hare Intl Toronto Pearson Intl

3:25 p.m. - 9:40 p.m.YXU London-STL Lambert-St Louis

7h 15m2 stops Toronto Pearson Intl Chicago O'Hare Intl

C$ 1,330Air Canada

Thu, 22 Oct - Mon, 26 Oct

8:55 a.m. - 2:50 p.m.STL Lambert-St Louis-YXU London

4h 55m1 stop Toronto Pearson Intl

3:25 p.m. - 8:53 a.m.YXU London-STL Lambert-St Louis

18h 28m2 stops Toronto Pearson Intl Newark

C$ 1,345United Airlines

Thu, 22 Oct - Mon, 26 Oct

6:47 a.m. - 5:20 a.m.STL Lambert-St Louis-YXU London

21h 33m2 stops Detroit Metropolitan Wayne County Calgary

7:40 a.m. - 9:09 a.m.YXU London-STL Lambert-St Louis

26h 29m2 stops Calgary Atlanta Hartsfield-Jackson

C$ 1,353WestJet

Thu, 22 Oct - Thu, 29 Oct

8:00 a.m. - 9:40 p.m.STL Lambert-St Louis-YXU London

12h 40m2 stops Chicago O'Hare Intl Toronto Pearson Intl

3:25 p.m. - 8:53 a.m.YXU London-STL Lambert-St Louis

18h 28m2 stops Toronto Pearson Intl Newark

C$ 1,359United Airlines

Thu, 22 Oct - Mon, 26 Oct

8:55 a.m. - 2:50 p.m.STL Lambert-St Louis-YXU London

4h 55m1 stop Toronto Pearson Intl

9:15 a.m. - 3:23 p.m.YXU London-STL Lambert-St Louis

7h 08m1 stop Toronto Pearson Intl

C$ 1,364Air Canada

Thu, 22 Oct - Thu, 29 Oct

8:55 a.m. - 2:50 p.m.STL Lambert-St Louis-YXU London

4h 55m1 stop Toronto Pearson Intl

9:15 a.m. - 3:23 p.m.YXU London-STL Lambert-St Louis

7h 08m1 stop Toronto Pearson Intl

C$ 1,396Air Canada

Thu, 22 Oct - Mon, 26 Oct

8:55 a.m. - 2:50 p.m.STL Lambert-St Louis-YXU London

4h 55m1 stop Toronto Pearson Intl

9:15 a.m. - 3:23 p.m.YXU London-STL Lambert-St Louis

7h 08m1 stop Toronto Pearson Intl

C$ 1,397Air Canada

Thu, 22 Oct - Mon, 26 Oct

8:55 a.m. - 2:50 p.m.STL Lambert-St Louis-YXU London

4h 55m1 stop Toronto Pearson Intl

9:15 a.m. - 3:23 p.m.YXU London-STL Lambert-St Louis

7h 08m1 stop Toronto Pearson Intl

C$ 1,404Air Canada

Thu, 22 Oct - Mon, 26 Oct

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United Airlines flights from St. Louis to London, Ontario

Our best United Airlines deals on St. Louis to London, Ontario flight tickets

United Airlines

22 Oct

STL8:55 a.m.Lambert-St Louis

4h 55m

1 stop

YXU2:50 p.m.London

26 Oct

YXU3:25 p.m.London

18h 28m

2 stops

STL8:53 a.m.Lambert-St Louis

C$ 1,345

United Airlines

22 Oct

STL8:00 a.m.Lambert-St Louis

12h 40m

2 stops

YXU9:40 p.m.London

26 Oct

YXU3:25 p.m.London

18h 28m

2 stops

STL8:53 a.m.Lambert-St Louis

C$ 1,359

Air Canada flights from St. Louis to London, Ontario

Our best Air Canada deals on St. Louis to London, Ontario flight tickets

Air Canada

16 Jan

STL4:05 p.m.Lambert-St Louis

4h 42m

1 stop

YXU9:47 p.m.London

19 Jan

YXU9:15 a.m.London

7h 11m

1 stop

STL3:26 p.m.Lambert-St Louis

C$ 1,150

Air Canada

22 Oct

STL2:40 p.m.Lambert-St Louis

4h 00m

1 stop

YXU7:40 p.m.London

26 Oct

YXU3:25 p.m.London

7h 15m

2 stops

STL9:40 p.m.Lambert-St Louis

C$ 1,316

Air Canada

22 Oct

STL8:00 a.m.Lambert-St Louis

10h 40m

2 stops

YXU7:40 p.m.London

26 Oct

YXU3:25 p.m.London

7h 15m

2 stops

STL9:40 p.m.Lambert-St Louis

C$ 1,330

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Sat 16/1

4:05 p.m.-9:47 p.m.

1 stop4h 42m

London

Tue 19/1

9:15 a.m.-3:26 p.m.

1 stop7h 11m

C$ 1,150

Quickest round-trip

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

2:40 p.m.-7:40 p.m.

1 stop4h 00m

London

Mon 26/10

3:25 p.m.-9:40 p.m.

2 stops7h 15m

C$ 1,316

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

8:00 a.m.-7:40 p.m.

2 stops10h 40m

London

Mon 26/10

3:25 p.m.-9:40 p.m.

2 stops7h 15m

C$ 1,330

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

8:55 a.m.-2:50 p.m.

1 stop4h 55m

London

Mon 26/10

3:25 p.m.-8:53 a.m.

2 stops18h 28m

C$ 1,345

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

6:47 a.m.-5:20 a.m.

2 stops21h 33m

London

Thu 29/10

7:40 a.m.-9:09 a.m.

2 stops26h 29m

C$ 1,353

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

8:00 a.m.-9:40 p.m.

2 stops12h 40m

London

Mon 26/10

3:25 p.m.-8:53 a.m.

2 stops18h 28m

C$ 1,359

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

8:55 a.m.-2:50 p.m.

1 stop4h 55m

London

Thu 29/10

9:15 a.m.-3:23 p.m.

1 stop7h 08m

C$ 1,364

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

8:55 a.m.-2:50 p.m.

1 stop4h 55m

London

Mon 26/10

9:15 a.m.-3:23 p.m.

1 stop7h 08m

C$ 1,396

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

8:55 a.m.-2:50 p.m.

1 stop4h 55m

London

Mon 26/10

9:15 a.m.-3:23 p.m.

1 stop7h 08m

C$ 1,397

St. LouisLondon

STL Lambert-St Louis - YXU London

STLYXU

Lambert-St Louis

Thu 22/10

8:55 a.m.-2:50 p.m.

1 stop4h 55m

London

Mon 26/10

9:15 a.m.-3:23 p.m.

1 stop7h 08m

C$ 1,404

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to London, Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to London?

Air Canada is the most popular carrier operating from Lambert-St Louis to London

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$ 528
Fastest flight time	4h 55m
Direct flights	None

The best one-way flight to London, Ontario from St. Louis in the past 72 hours is C$ 528. The best round-trip flight deal from St. Louis to London, Ontario found on momondo in the last 72 hours is C$ 1,150.

The fastest flight from St. Louis to London, Ontario takes 4h 55m

There are no direct flights from St. Louis to London, Ontario. There are no popular flight routes from St. Louis to London, Ontario.

Search flight deals

Frequently asked questions about flying from St. Louis to London, Ontario

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 4h 55m.
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.

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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.