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Cheap flights from La Crosse to St. Louis from $361

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from La Crosse to St. Louis departing on 9/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from La Crosse to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:20 pm - 6:57 pmLSE  La Crosse-STL Lambert-St Louis
25h 37m1 stop Chicago O'Hare Intl
American Airlines Logo
6:00 am - 12:22 amSTL  Lambert-St Louis-LSE La Crosse
18h 22m1 stop Chicago O'Hare Intl
$361American Airlines
Fri, Sep 4 - Mon, Sep 7
American Airlines Logo
5:20 pm - 12:54 pmLSE  La Crosse-STL Lambert-St Louis
19h 34m1 stop Chicago O'Hare Intl
American Airlines Logo
4:50 pm - 11:49 amSTL  Lambert-St Louis-LSE La Crosse
18h 59m1 stop Chicago O'Hare Intl
$378American Airlines
Tue, Sep 1 - Mon, Sep 7
American Airlines Logo
12:19 pm - 4:20 pmLSE  La Crosse-STL Lambert-St Louis
4h 01m1 stop Chicago O'Hare Intl
American Airlines Logo
11:31 am - 6:20 pmSTL  Lambert-St Louis-LSE La Crosse
6h 49m1 stop Chicago O'Hare Intl
$470American Airlines
Wed, Sep 2 - Thu, Oct 8
American Airlines Logo
5:53 am - 1:03 pmLSE  La Crosse-STL Lambert-St Louis
7h 10m2 stops Chicago O'Hare Intl Charlotte Douglas
American Airlines Logo
7:27 am - 11:22 amSTL  Lambert-St Louis-LSE La Crosse
3h 55m1 stop Chicago O'Hare Intl
$500American Airlines
Sat, Sep 19 - Sat, Sep 26
American Airlines Logo
5:20 pm - 1:02 pmLSE  La Crosse-STL Lambert-St Louis
19h 42m2 stops Chicago O'Hare Intl Charlotte Douglas
American Airlines Logo
4:50 pm - 11:49 amSTL  Lambert-St Louis-LSE La Crosse
18h 59m1 stop Chicago O'Hare Intl
$534American Airlines
Tue, Sep 1 - Mon, Sep 7
American Airlines Logo
5:53 am - 5:30 pmLSE  La Crosse-STL Lambert-St Louis
11h 37m2 stops Chicago O'Hare Intl Charlotte Douglas
American Airlines Logo
8:43 am - 12:20 amSTL  Lambert-St Louis-LSE La Crosse
15h 37m2 stops Charlotte Douglas Chicago O'Hare Intl
$539American Airlines
Sat, Sep 19 - Sat, Sep 26
American Airlines Logo
5:20 pm - 1:02 pmLSE  La Crosse-STL Lambert-St Louis
19h 42m2 stops Chicago O'Hare Intl Charlotte Douglas
American Airlines Logo
4:50 pm - 11:49 amSTL  Lambert-St Louis-LSE La Crosse
18h 59m1 stop Chicago O'Hare Intl
$552American Airlines
Tue, Sep 1 - Mon, Sep 7
American Airlines Logo
6:00 am - 4:25 pmLSE  La Crosse-STL Lambert-St Louis
10h 25m2 stops Chicago O'Hare Intl Charlotte Douglas
American Airlines Logo
7:29 am - 11:53 amSTL  Lambert-St Louis-LSE La Crosse
4h 24m1 stop Chicago O'Hare Intl
$553American Airlines
Wed, Sep 2 - Thu, Oct 8
American Airlines Logo
3:14 pm - 6:57 pmLSE  La Crosse-STL Lambert-St Louis
3h 43m1 stop Chicago O'Hare Intl
American Airlines Logo
5:00 am - 11:23 amSTL  Lambert-St Louis-LSE La Crosse
6h 23m1 stop Chicago O'Hare Intl
$559American Airlines
Sat, Aug 22 - Sun, Aug 23
American Airlines Logo
12:24 pm - 10:40 pmLSE  La Crosse-STL Lambert-St Louis
10h 16m2 stops Chicago O'Hare Intl Charlotte Douglas
American Airlines Logo
5:00 am - 11:23 amSTL  Lambert-St Louis-LSE La Crosse
6h 23m1 stop Chicago O'Hare Intl
$597American Airlines
Sat, Aug 22 - Sun, Aug 23

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American Airlines flights from La Crosse to St. Louis

Our best American Airlines deals on La Crosse to St. Louis flight tickets
American Airlines
Sep 4
LSE5:20 pmLa Crosse
25h 37m
1 stop
STL6:57 pmLambert-St Louis
Sep 7
STL6:00 amLambert-St Louis
18h 22m
1 stop
LSE12:22 amLa Crosse
$361
American Airlines
Sep 1
LSE5:20 pmLa Crosse
19h 34m
1 stop
STL12:54 pmLambert-St Louis
Sep 7
STL4:50 pmLambert-St Louis
18h 59m
1 stop
LSE11:49 amLa Crosse
$378
American Airlines
Sep 2
LSE12:19 pmLa Crosse
4h 01m
1 stop
STL4:20 pmLambert-St Louis
Oct 8
STL11:31 amLambert-St Louis
6h 49m
1 stop
LSE6:20 pmLa Crosse
$470

momondo Fare Finder

 
Customize your flight search to find flights from La Crosse to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 7, 2026.
Use the filters below to find and compare flights from La Crosse to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Fri 9/4

5:20 pm-6:57 pm

1 stop25h 37m

Lambert-St Louis

Mon 9/7

6:00 am-12:22 am

1 stop18h 22m

$361

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Tue 9/1

5:20 pm-12:54 pm

1 stop19h 34m

Lambert-St Louis

Mon 9/7

4:50 pm-11:49 am

1 stop18h 59m

$378

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Wed 9/2

12:19 pm-4:20 pm

1 stop4h 01m

Lambert-St Louis

Thu 10/8

11:31 am-6:20 pm

1 stop6h 49m

$470

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Sat 9/19

5:53 am-1:03 pm

2 stops7h 10m

Lambert-St Louis

Sat 9/26

7:27 am-11:22 am

1 stop3h 55m

$500

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Tue 9/1

5:20 pm-1:02 pm

2 stops19h 42m

Lambert-St Louis

Mon 9/7

4:50 pm-11:49 am

1 stop18h 59m

$534

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Sat 9/19

5:53 am-5:30 pm

2 stops11h 37m

Lambert-St Louis

Sat 9/26

8:43 am-12:20 am

2 stops15h 37m

$539

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Tue 9/1

5:20 pm-1:02 pm

2 stops19h 42m

Lambert-St Louis

Mon 9/7

4:50 pm-11:49 am

1 stop18h 59m

$552

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Wed 9/2

6:00 am-4:25 pm

2 stops10h 25m

Lambert-St Louis

Thu 10/8

7:29 am-11:53 am

1 stop4h 24m

$553
Quickest round-trip

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Sat 8/22

3:14 pm-6:57 pm

1 stop3h 43m

Lambert-St Louis

Sun 8/23

5:00 am-11:23 am

1 stop6h 23m

$559

La CrosseSt. Louis

LSE La Crosse - STL Lambert-St Louis

LSESTL

La Crosse

Sat 8/22

12:24 pm-10:40 pm

2 stops10h 16m

Lambert-St Louis

Sun 8/23

5:00 am-11:23 am

1 stop6h 23m

$597

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from La Crosse to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from La Crosse to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap La Crosse to St. Louis (LSE to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from La Crosse to St. Louis

Fastest flight time

3h 43m

Direct flights

None
The fastest flight from La Crosse to St. Louis takes 3h 43m
There are no direct flights from La Crosse to St. Louis. There are no popular flight routes from La Crosse to St. Louis.
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Frequently asked questions about flying from La Crosse to St. Louis

  • How far is La Crosse to Lambert-St Louis by plane?

    The distance between La Crosse and Lambert-St Louis is about 361.3 mi. By plane, this route typically takes 3h 43m.

  • When did momondo last update prices for flights from La Crosse Airport to Lambert-St Louis Airport?

    Prices for flights from La Crosse Airport to Lambert-St Louis Airport are updated daily.

  • How old do you have to be to fly from La Crosse Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from La Crosse Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from La Crosse to St. Louis

  • How do I get Price Alerts for flights from La Crosse to St. Louis?

    Search flight deals from La Crosse to St. Louis. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from La Crosse to St. Louis with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Florissant
Collinsville
Alton
O'Fallon
Clayton
Farmington
Fenton
Wentzville
Festus
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from La Crosse to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from La Crosse to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from La Crosse to St. Louis with flexible booking policies on momondo?

All flight searches from La Crosse to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from La Crosse to St. Louis?

Once all potential La Crosse to St. Louis 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 La Crosse to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from La Crosse to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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