Find cheap flights to St. Louis from $43

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 7/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 6/15
Sat 6/22

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These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis
In the last 7 days travelers have searched 44,216,777 times on KAYAK, and here is why:

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Cheap flight deals to St. Louis

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
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11:35 am - 1:21 pmDFW-STL
1h 46mnonstop
2:11 pm - 3:57 pmSTL-DFW
1h 46mnonstop
$43Frontier
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Wed, Jul 31 - Wed, Aug 7
11:46 am - 1:32 pmDFW-STL
1h 46mnonstop
2:21 pm - 4:07 pmSTL-DFW
1h 46mnonstop
$57Frontier
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Fri, Aug 9 - Mon, Aug 12
8:15 pm - 9:35 pmORD-STL
1h 20mnonstop
6:22 am - 7:40 amSTL-ORD
1h 18mnonstop
$91American Airlines
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Tue, Oct 22 - Tue, Oct 29
9:55 am - 11:16 amORD-STL
1h 21mnonstop
7:30 am - 8:51 amSTL-ORD
1h 21mnonstop
$98American Airlines
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Thu, Sep 12 - Sat, Sep 14
8:35 am - 9:56 amIAD-STL
2h 21mnonstop
5:20 pm - 12:15 amSTL-IAD
5h 55m1 stop
$116United Airlines
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Wed, Aug 21 - Mon, Aug 26
8:35 am - 9:56 amIAD-STL
2h 21mnonstop
5:20 pm - 12:15 amSTL-IAD
5h 55m1 stop
$124United Airlines
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Wed, Aug 21 - Mon, Aug 26
7:10 am - 4:46 pmORD-STL
9h 36m2 stops
6:30 am - 12:41 pmSTL-ORD
6h 11m1 stop
$161Delta
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Wed, Jul 24 - Sat, Jul 27
6:00 am - 11:43 amIAD-STL
6h 43m1 stop
3:55 pm - 11:58 pmSTL-IAD
7h 03m1 stop
$176Delta
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Sat, Sep 21 - Sat, Sep 28
7:29 am - 1:25 pmSEA-STL
3h 56mnonstop
2:34 pm - 4:59 pmSTL-SEA
4h 25mnonstop
$277Alaska Airlines
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Mon, Aug 26 - Tue, Sep 3
7:29 am - 1:25 pmSEA-STL
3h 56mnonstop
7:00 am - 9:26 amSTL-SEA
4h 26mnonstop
$297Alaska Airlines
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Wed, Sep 4 - Mon, Sep 9