Find cheap flights to St. Louis

STL

Find cheap flights to St. Louis

Round-trip
Economy
Boston (BOS)
Lambert-St Louis
Tue. 4/8
Tue. 11/8
Any month
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Good to know

Low season

January Best time to beat the crowds (3% less expensive on average)

High season

December Most popular time to fly (9% more expensive on average)

Average price of a round-trip

C$ 362 (avg. price over the last 2 weeks)

Good deal for a round-trip

C$ 253 or less

Top tips for finding cheap flights to St. Louis

  • Looking for cheap airfare to St. Louis? 25% of our users found round-trip tickets to St. Louis for the following prices or less: From Ottawa C$ 340, from Calgary C$ 344, from Vancouver Intl C$ 390
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be June, July and August. The cheapest month to fly to St. Louis is April.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs - booking St. Louis flights

How long is the flight to St. Louis?

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Which airlines fly to St. Louis?

How far is St. Louis Airport from central St. Louis?

What is the name of St. Louis’s airport?

How does KAYAK find such low prices on flights to St. Louis?

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to St. Louis?

What is the Hacker Fare option on flights to St. Louis?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to St. Louis?

Top 5 airlines flying to Lambert-St Louis

Scores according to KAYAK customer reviews

8.7
Korean Air
Overall score based on 4,926 reviews
8.9
Boarding
8.6
Comfort
9.1
Crew
8.6
Entertainment
8.5
Food
Airline reviews
Read more about Korean Air

Book Cheap St. Louis Plane Tickets (Round-trip)

Airports
Origin
Québec City
C$ 252
only
C$ 252
Ottawa
C$ 239
only
C$ 239
Montreal
C$ 261
only
C$ 261
Toronto
C$ 284
only
C$ 284
Destination
St. Louis
C$ 239
only
C$ 239
Wed., 2 Dec.
YOW
Ottawa Airport
STL
St. Louis Lambert Airport
5h 24m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YOW
Ottawa Airport
4h 59m
C$ 239
Trip: 15 days
Based on null reviews
Wed., 2 Dec.
YOW
Ottawa Airport
STL
St. Louis Lambert Airport
5h 24m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YOW
Ottawa Airport
6h 54m
C$ 240
Trip: 15 days
Based on null reviews
Wed., 2 Dec.
YQB
Québec City
STL
St. Louis Lambert Airport
5h 24m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YQB
Québec City
5h 54m
C$ 255
Trip: 15 days
Based on null reviews
Wed., 2 Dec.
YOW
Ottawa Airport
STL
St. Louis Lambert Airport
7h 18m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YOW
Ottawa Airport
4h 39m
C$ 255
Trip: 15 days
Based on null reviews
Fri., 7 Aug.
YUL
Montreal Trudeau Airport
STL
St. Louis Lambert Airport
6h 54m
Tue., 11 Aug.
STL
St. Louis Lambert Airport
YUL
Montreal Trudeau Airport
6h 56m
C$ 261
Trip: 5 days
Based on null reviews
Thu., 6 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
9h 03m
Thu., 27 Aug.
STL
St. Louis Lambert Airport
YYZ
Toronto Pearson Airport
19h 53m
C$ 284
Trip: 22 days
Based on null reviews
Thu., 6 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
7h 34m
Thu., 27 Aug.
STL
St. Louis Lambert Airport
YYZ
Toronto Pearson Airport
4h 02m
C$ 288
Trip: 22 days
Based on null reviews
Wed., 5 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
4h 04m
Wed., 26 Aug.
STL
St. Louis Lambert Airport
YYZ
Toronto Pearson Airport
5h 26m
C$ 302
Trip: 22 days
Based on null reviews
Fri., 28 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
4h 36m
Fri., 20 Nov.
STL
St. Louis Lambert Airport
YYZ
Toronto Pearson Airport
2h 03m
C$ 306
Trip: 85 days
Based on null reviews
Thu., 6 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
5h 56m
Thu., 27 Aug.
STL
St. Louis Lambert Airport
YYZ
Toronto Pearson Airport
4h 19m
C$ 312
Trip: 22 days
Based on null reviews
Wed., 5 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
15h 52m
Wed., 26 Aug.
STL
St. Louis Lambert Airport
YYZ
Toronto Pearson Airport
5h 26m
C$ 375
Trip: 22 days
Based on null reviews
Wed., 2 Dec.
YOW
Ottawa Airport
STL
St. Louis Lambert Airport
5h 24m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YOW
Ottawa Airport
11h 15m
C$ 456
Trip: 15 days
Based on null reviews
Wed., 2 Dec.
YQB
Québec City
STL
St. Louis Lambert Airport
5h 24m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YQB
Québec City
8h 09m
C$ 252
Trip: 15 days
Based on null reviews
Wed., 2 Dec.
YQB
Québec City
STL
St. Louis Lambert Airport
8h 09m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YQB
Québec City
8h 39m
C$ 253
Trip: 15 days
Based on null reviews
Wed., 2 Dec.
YQB
Québec City
STL
St. Louis Lambert Airport
7h 00m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YQB
Québec City
5h 54m
C$ 264
Trip: 15 days
Based on null reviews
Wed., 2 Dec.
YQB
Québec City
STL
St. Louis Lambert Airport
13h 31m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YQB
Québec City
10h 03m
C$ 278
Trip: 15 days
Based on null reviews
Mon., 17 Aug.
YQB
Québec City
STL
St. Louis Lambert Airport
6h 15m
Sat., 22 Aug.
STL
St. Louis Lambert Airport
YQB
Québec City
22h 06m
C$ 268
Trip: 6 days
Based on null reviews
Wed., 2 Dec.
YQB
Québec City
STL
St. Louis Lambert Airport
13h 31m
Wed., 16 Dec.
STL
St. Louis Lambert Airport
YQB
Québec City
10h 03m
C$ 279
Trip: 15 days
Based on null reviews
Mon., 17 Aug.
YQB
Québec City
STL
St. Louis Lambert Airport
11h 02m
Sat., 22 Aug.
STL
St. Louis Lambert Airport
YQB
Québec City
5h 13m
C$ 280
Trip: 6 days
Based on null reviews
Sun., 16 Aug.
YQB
Québec City
STL
St. Louis Lambert Airport
6h 15m
Sat., 22 Aug.
STL
St. Louis Lambert Airport
YQB
Québec City
5h 13m
C$ 269
Trip: 7 days
Based on null reviews
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Book Cheap St. Louis Plane Tickets (One-way)

Airports
Origin
Vancouver
C$ 193
only
C$ 193
Calgary
C$ 176
only
C$ 176
Montreal
C$ 377
only
C$ 377
Toronto
C$ 169
only
C$ 169
Destination
St. Louis
C$ 169
only
C$ 169
Tue., 18 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
10h 12m
C$ 169
Based on null reviews
Sun., 9 Aug.
YYC
Calgary Airport
STL
St. Louis Lambert Airport
5h 35m
C$ 176
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
4h 04m
C$ 184
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
6h 52m
C$ 190
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
15h 34m
C$ 257
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
7h 44m
C$ 280
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
4h 53m
C$ 282
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
16h 18m
C$ 290
Based on null reviews
Sun., 9 Aug.
YYC
Calgary Airport
STL
St. Louis Lambert Airport
5h 41m
C$ 290
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
7h 54m
C$ 296
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
5h 17m
C$ 308
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
7h 33m
C$ 318
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
22h 10m
C$ 330
Based on null reviews
Sat., 29 Aug.
YVR
Vancouver Airport
STL
St. Louis Lambert Airport
24h 39m
C$ 350
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
9h 21m
C$ 180
Based on null reviews
Fri., 21 Aug.
YYZ
Toronto Pearson Airport
STL
St. Louis Lambert Airport
4h 36m
C$ 185
Based on null reviews
Sun., 2 Aug.
YUL
Montreal Trudeau Airport
STL
St. Louis Lambert Airport
26h 25m
C$ 377
Based on null reviews
Fri., 28 Aug.
YVR
Vancouver Airport
STL
St. Louis Lambert Airport
13h 52m
C$ 193
Based on null reviews
Sat., 29 Aug.
YVR
Vancouver Airport
STL
St. Louis Lambert Airport
9h 30m
C$ 196
Based on null reviews
Sat., 29 Aug.
YVR
Vancouver Airport
STL
St. Louis Lambert Airport
12h 51m
C$ 198
Based on null reviews
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Book Cheap Domestic Plane Tickets to St. Louis

Airports
Origin
Washington
C$ 170
only
C$ 170
Destination
St. Louis
C$ 170
only
C$ 170
Thu., 10 Sep.
DCA
Reagan Washington National Airport
STL
St. Louis Lambert Airport
2h 26m
Sun., 13 Sep.
STL
St. Louis Lambert Airport
DCA
Reagan Washington National Airport
9h 45m
C$ 170
Trip: 4 days
Based on null reviews
Sun., 13 Sep.
DCA
Reagan Washington National Airport
STL
St. Louis Lambert Airport
2h 17m
Fri., 18 Sep.
STL
St. Louis Lambert Airport
DCA
Reagan Washington National Airport
7h 12m
C$ 210
Trip: 6 days
Based on null reviews
Mon., 10 Aug.
DCA
Reagan Washington National Airport
STL
St. Louis Lambert Airport
2h 26m
Mon., 24 Aug.
STL
St. Louis Lambert Airport
DCA
Reagan Washington National Airport
3h 39m
C$ 216
Trip: 15 days
Based on null reviews
Tue., 25 Aug.
DCA
Reagan Washington National Airport
STL
St. Louis Lambert Airport
4h 23m
Tue., 1 Sep.
STL
St. Louis Lambert Airport
DCA
Reagan Washington National Airport
4h 08m
C$ 220
Trip: 8 days
Based on null reviews
Tue., 25 Aug.
DCA
Reagan Washington National Airport
STL
St. Louis Lambert Airport
4h 29m
Wed., 16 Sep.
STL
St. Louis Lambert Airport
DCA
Reagan Washington National Airport
4h 20m
C$ 223
Trip: 23 days
Based on null reviews
*
Prices are per person, are for e–tickets and include all taxes & fees in CAD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

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