Lowest Prices
Find the lowest STL airfares by comparing hundreds of airlines and agencies.
Good to Know: Flights to STL
Useful information for finding cheap flights to Lambert St Louis International and booking your next trip
Cheapest Round Trip Flight
$570
Frontier Airlines
• 1 stop
• 40h 8m
Jun 28 – Jul 05
The cheapest round trip flight from Ontario to St Louis (ONT-STL-ONT) is currently $570
Cheapest One way Flight
$250
Alaska Airlines
• 1 stop
• 47h 25m
Jul 01
The cheapest one way flight from Sacramento to St Louis (SMF-STL) is currently $250
Cheapest Direct Flight
$323
Southwest Airlines
• nonstop
• 3h 25m
Sep 24
The cheapest nonstop flight from Austin to St Louis (AUS-STL) is currently $323
Fastest Flight
3h 25m
The fastest nonstop flight from Austin to St Louis (AUS-STL) takes 3h 25m
Top Airlines Flying to Lambert St Louis International (STL)
Best Flight Deals to St Louis
Identify the most efficient round-trip flights to St Louis. We present options balancing cost and convenience for your return journey.
Jun 28 - Jul 05, Economy
Ontario → St Louis
40h 8m
11:58 AM - 2:06 PM • 1 stop
Ontario → St Louis
6h 49m
6:37 AM - 8:46 AM • nonstop
Frontier Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
15h 51m
12:08 PM - 11:59 PM • 1 stop
Ontario → St Louis
15h 7m
6:02 AM - 1:09 PM • 1 stop
Alaska Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
12h 17m
7:00 AM - 4:37 PM • 1 stop
Ontario → St Louis
17h 1m
2:50 PM - 11:11 PM • 1 stop
Alaska Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
8h 45m
1:18 PM - 8:43 PM • 1 stop
Ontario → St Louis
9h 14m
4:48 PM - 8:42 PM • 1 stop
United Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
11h 50m
11:55 AM - 9:05 PM • 1 stop
Ontario → St Louis
16h 40m
6:00 AM - 2:00 PM • 1 stop
Southwest Airlines
For travel requiring no set return, access available one-way flights to St Louis (STL). These options support extended stays or open-ended plans.
Need to travel to St Louis soon? View current last-minute flight options to STL for spontaneous or pressing plans.
Jun 28 - Jul 05, Economy
Ontario → St Louis
40h 8m
11:58 AM - 2:06 PM • 1 stop
Ontario → St Louis
6h 49m
6:37 AM - 8:46 AM • nonstop
Frontier Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
15h 51m
12:08 PM - 11:59 PM • 1 stop
Ontario → St Louis
15h 7m
6:02 AM - 1:09 PM • 1 stop
Alaska Airlines
Maximize your time in St Louis, not in transit. Discover non-stop direct flights to STL for the quickest, most straightforward journey to the Strip.
Sep 24 - Sep 25, Economy
Austin → St Louis
3h 25m
3:15 PM - 5:20 PM • nonstop
Austin → St Louis
3h 20m
8:45 PM - 10:45 PM • nonstop
Southwest Airlines
Sep 24 - Sep 25, Economy
Austin → St Louis
3h 25m
7:25 AM - 9:30 AM • nonstop
Austin → St Louis
3h 20m
8:45 PM - 10:45 PM • nonstop
Southwest Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
- • nonstop
Ontario → St Louis
- • nonstop
American Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
- • nonstop
Ontario → St Louis
- • nonstop
Alaska Airlines
Jun 28 - Jul 05, Economy
Ontario → St Louis
5h 40m
5:30 AM - 11:10 AM • nonstop
Ontario → St Louis
5h 55m
10:50 PM - 12:45 AM • nonstop
Southwest Airlines
FAQs on Flights to St Louis (STL)
Which airlines fly to St Louis?
Airlines flying the most to St Louis (STL)
What is the cheapest flight to STL Airport?
In the past couple of days, the cheapest tickets to STL were found on AS : USD 250
What are the most popular origin to St Louis (STL)?
Travelers frequently travel from Austin, Ontario, Sacramento to St Louis (STL)
Airport Information: Lambert St Louis International (STL)
- IATA Code
- STL
- Name
- Lambert St Louis International
- City
- St Louis
- Country
- US
- Latitude
- 38.74869918823242
- Longitude
- -90.37000274658203
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