Find Cheap Flights to United States

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Lambert-St Louis to United States

(Round-trip)
Depart: Sat Aug 19 2017 Return: Wed Aug 23 2017 Trip spans 5 days
United
United
STL
DEN
2h 18m
nonstop
DEN
STL
2h 06m
nonstop
Depart: Tue Aug 29 2017 Return: Wed Sep 6 2017 Trip spans 9 days
Frontier
Frontier
STL
DEN
2h 20m
nonstop
DEN
STL
2h 06m
nonstop
Depart: Tue Sep 26 2017 Return: Sat Sep 30 2017 Trip spans 5 days
Multiple Airlines
Multiple Airlines
STL
DEN
2h 20m
nonstop
DEN
STL
2h 02m
nonstop
Depart: Sat Sep 16 2017 Return: Sat Sep 23 2017 Trip spans 8 days
American Airlines
American Airlines
STL
DCA
2h 06m
nonstop
DCA
STL
2h 24m
nonstop
Depart: Sun Aug 20 2017 Return: Sat Aug 26 2017 Trip spans 7 days
United
United
STL
DEN
2h 23m
nonstop
DEN
STL
2h 06m
nonstop
Depart: Fri Oct 6 2017 Return: Mon Oct 9 2017 Trip spans 4 days
Frontier
Frontier
STL
DEN
2h 23m
nonstop
DEN
STL
1h 57m
nonstop
Depart: Thu Aug 10 2017 Return: Sun Aug 13 2017 Trip spans 4 days
Delta
Delta
STL
FLL
7h 15m
1 stop
FLL
STL
4h 15m
1 stop
Depart: Thu Sep 7 2017 Return: Wed Sep 13 2017 Trip spans 7 days
United
United
STL
DEN
2h 20m
nonstop
DEN
STL
2h 10m
nonstop
Depart: Sat Oct 7 2017 Return: Mon Oct 9 2017 Trip spans 3 days
Frontier
Frontier
STL
DEN
2h 23m
nonstop
DEN
STL
1h 57m
nonstop
Depart: Wed Sep 13 2017 Return: Tue Sep 19 2017 Trip spans 7 days
United
United
STL
DEN
2h 20m
nonstop
DEN
STL
1h 59m
nonstop
Depart: Thu Nov 16 2017 Return: Mon Nov 20 2017 Trip spans 5 days
United
United
STL
DEN
2h 22m
nonstop
DEN
STL
2h 00m
nonstop
Depart: Thu Nov 30 2017 Return: Sun Dec 3 2017 Trip spans 4 days
United
United
STL
DEN
2h 22m
nonstop
DEN
STL
1h 58m
nonstop
Depart: Wed Sep 27 2017 Return: Tue Oct 3 2017 Trip spans 7 days
American Airlines
American Airlines
STL
DCA
2h 16m
nonstop
DCA
STL
2h 12m
nonstop
Depart: Thu Aug 24 2017 Return: Sat Aug 26 2017 Trip spans 3 days
Multiple Airlines
Multiple Airlines
STL
DFW
1h 50m
nonstop
DFW
STL
8h 17m
1 stop
Depart: Tue Dec 5 2017 Return: Sun Dec 10 2017 Trip spans 6 days
United
United
STL
DEN
2h 30m
nonstop
DEN
STL
1h 58m
nonstop
Depart: Tue Oct 10 2017 Return: Sat Oct 14 2017 Trip spans 5 days
American Airlines
American Airlines
STL
DCA
2h 06m
nonstop
DCA
STL
2h 22m
nonstop
Depart: Thu Jan 25 2018 Return: Sun Jan 28 2018 Trip spans 4 days
United
United
STL
DEN
2h 30m
nonstop
DEN
STL
1h 58m
nonstop
Depart: Thu Nov 2 2017 Return: Tue Nov 7 2017 Trip spans 6 days
American Airlines
American Airlines
STL
DCA
2h 18m
nonstop
DCA
STL
2h 25m
nonstop
Depart: Fri Aug 25 2017 Return: Mon Aug 28 2017 Trip spans 4 days
Multiple Airlines
Multiple Airlines
STL
DCA
2h 08m
nonstop
DCA
STL
2h 28m
nonstop
Depart: Mon Aug 28 2017 Return: Wed Aug 30 2017 Trip spans 3 days
American Airlines
American Airlines
STL
DFW
1h 52m
nonstop
DFW
STL
1h 40m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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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,
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Airports
Origin

St. Louis
$135
Destination

Fort Lauderdale
$294
Denver
$135
Dallas
$215
Washington
$203