What airlines fly to St. Louis?

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Appleton according to our data. American Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Appleton Intl to Lambert-St Louis?

American Airlines is the most popular carrier operating from Appleton Intl to Lambert-St Louis

When did momondo last update prices for flights from Appleton Intl Airport to Lambert-St Louis Airport?

Prices for flights from Appleton Intl Airport to Lambert-St Louis Airport refresh daily.

How many operators does momondo search for flights from Appleton Intl Airport to Lambert-St Louis Airport?

The number of operators available for flights from Appleton Intl Airport to Lambert-St Louis Airport is 3 as of August 2025.

How old do you have to be to fly from Appleton Intl Airport to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Appleton Intl 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.

$183 Cheap Flights from Appleton to St. Louis in 2025

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Find the cheapest flights from Appleton to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

6:35 pm - 10:15 pmATW-STL

3h 40m1 stop

6:05 am - 9:06 amSTL-ATW

3h 01m1 stop

$214American Airlines

Find Deal

Sun, Aug 31 - Sun, Sep 7

6:35 pm - 11:51 pmATW-STL

5h 16m1 stop

6:00 am - 9:17 amSTL-ATW

3h 17m1 stop

$229American Airlines

Find Deal

Thu, Aug 28 - Sun, Aug 31

6:00 am - 9:26 amATW-STL

3h 26m1 stop

8:17 am - 5:48 pmSTL-ATW

9h 31m2 stops

$234American Airlines

Find Deal

Thu, Sep 11 - Tue, Sep 16

6:00 am - 9:26 amATW-STL

3h 26m1 stop

3:59 pm - 9:32 pmSTL-ATW

5h 33m1 stop

$249American Airlines

Find Deal

Thu, Sep 11 - Tue, Sep 16

5:21 pm - 9:40 pmATW-STL

4h 19m1 stop

5:24 pm - 9:33 pmSTL-ATW

4h 09m1 stop

$274United Airlines

Find Deal

Fri, Oct 31 - Mon, Nov 3

5:29 pm - 10:45 pmATW-STL

5h 16m1 stop

5:30 pm - 9:35 pmSTL-ATW

4h 05m1 stop

$351United Airlines

Find Deal

Thu, Aug 14 - Sun, Aug 17

6:12 pm - 9:55 pmATW-STL

3h 43m1 stop

6:40 am - 10:28 amSTL-ATW

3h 48m1 stop

$373Delta

Find Deal

Sat, Aug 16 - Wed, Aug 20

4:17 pm - 11:01 pmATW-STL

6h 44m1 stop

10:45 am - 4:59 pmSTL-ATW

6h 14m1 stop

$381Delta

Find Deal

Tue, Oct 28 - Wed, Oct 29

1:05 pm - 1:32 pmATW-STL

24h 27m3 stops

10:35 am - 10:42 amSTL-ATW

24h 07m2 stops

$551

Find Deal

Sun, Aug 31 - Sun, Sep 7

7:00 am - 12:00 pmATW-STL

29h 00m3 stops

10:54 am - 8:20 amSTL-ATW

21h 26m2 stops

$596

Find Deal

Sun, Oct 5 - Thu, Oct 9

United Airlines flights from Appleton to St. Louis

Our best United Airlines deals on Appleton to St. Louis flight tickets

United Airlines

Oct 31

ATW5:21 pmAppleton Intl

4h 19m

1 stop

STL9:40 pmLambert-St Louis

Nov 3

STL5:24 pmLambert-St Louis

4h 09m

1 stop

ATW9:33 pmAppleton Intl

$274

Find similar

United Airlines

Aug 14

ATW5:29 pmAppleton Intl

5h 16m

1 stop

STL10:45 pmLambert-St Louis

Aug 17

STL5:30 pmLambert-St Louis

4h 05m

1 stop

ATW9:35 pmAppleton Intl

$351

Find similar

United Airlines

Aug 7

ATW5:29 pmAppleton Intl

5h 16m

1 stop

STL10:45 pmLambert-St Louis

Aug 12

STL1:20 pmLambert-St Louis

5h 58m

1 stop

ATW7:18 pmAppleton Intl

$368

Find similar

American Airlines flights from Appleton to St. Louis

Our best American Airlines deals on Appleton to St. Louis flight tickets

American Airlines

Aug 31

ATW6:35 pmAppleton Intl

3h 40m

1 stop

STL10:15 pmLambert-St Louis

Sep 7

STL6:05 amLambert-St Louis

3h 01m

1 stop

ATW9:06 amAppleton Intl

$214

Find similar

American Airlines

Aug 28

ATW6:35 pmAppleton Intl

5h 16m

1 stop

STL11:51 pmLambert-St Louis

Aug 31

STL6:00 amLambert-St Louis

3h 17m

1 stop

ATW9:17 amAppleton Intl

$229

Find similar

American Airlines

Sep 11

ATW6:00 amAppleton Intl

3h 26m

1 stop

STL9:26 amLambert-St Louis

Sep 16

STL8:17 amLambert-St Louis

9h 31m

2 stops

ATW5:48 pmAppleton Intl

$234

Find similar

Fly from

Fly to

Route

Depart

Return

Price

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Sun 8/31

6:35 pm-10:15 pm

1 stop3h 40m

Lambert-St Louis

Sun 9/7

6:05 am-9:06 am

1 stop3h 01m

$214

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Thu 8/28

6:35 pm-11:51 pm

1 stop5h 16m

Lambert-St Louis

Sun 8/31

6:00 am-9:17 am

1 stop3h 17m

$229

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Thu 9/11

6:00 am-9:26 am

1 stop3h 26m

Lambert-St Louis

Tue 9/16

8:17 am-5:48 pm

2 stops9h 31m

$234

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Thu 9/11

6:00 am-9:26 am

1 stop3h 26m

Lambert-St Louis

Tue 9/16

3:59 pm-9:32 pm

1 stop5h 33m

$249

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Fri 10/31

5:21 pm-9:40 pm

1 stop4h 19m

Lambert-St Louis

Mon 11/3

5:24 pm-9:33 pm

1 stop4h 09m

$274

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Thu 8/14

5:29 pm-10:45 pm

1 stop5h 16m

Lambert-St Louis

Sun 8/17

5:30 pm-9:35 pm

1 stop4h 05m

$351

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Sat 8/16

6:12 pm-9:55 pm

1 stop3h 43m

Lambert-St Louis

Wed 8/20

6:40 am-10:28 am

1 stop3h 48m

$373

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Tue 10/28

4:17 pm-11:01 pm

1 stop6h 44m

Lambert-St Louis

Wed 10/29

10:45 am-4:59 pm

1 stop6h 14m

$381

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Sun 8/31

1:05 pm-1:32 pm

3 stops24h 27m

Lambert-St Louis

Sun 9/7

10:35 am-10:42 am

2 stops24h 07m

$551

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Sun 10/5

7:00 am-12:00 pm

3 stops29h 00m

Lambert-St Louis

Thu 10/9

10:54 am-8:20 am

2 stops21h 26m

$596

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Appleton to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to St. Louis?

In general, July is the cheapest month to fly from Appleton to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $264. The month of April is another great option to travel to St. Louis, with average flight prices from Appleton averaging around $274.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $263. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $370. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Appleton in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $280 when looking at flights departing in the afternoon. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $341 per ticket.

When to book flights from Appleton to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Appleton to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Appleton to St. Louis (ATW to STL) flight deals and tips

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

Best Price Found	$247
Fastest flight time	3h 26m
Direct flights	None
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from Appleton in the past 72 hours is $247. The best round-trip flight deal from Appleton to St. Louis found on momondo in the last 72 hours is $214.

The fastest flight from Appleton to St. Louis takes 3h 26m

There are no direct flights from Appleton to St. Louis. Popular non-direct route for this connection is Appleton Intl Airport - Lambert-St Louis Airport.

There is 1 airport near St. Louis: Lambert-St Louis (STL)

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How far is Appleton Intl to Lambert-St Louis by plane?
A flight from Appleton Intl to Lambert-St Louis will travel around 399.8 mi. By plane, this route typically takes 3h 26m.
When did momondo last update prices for flights from Appleton Intl Airport to Lambert-St Louis Airport?
Prices for flights from Appleton Intl Airport to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Appleton Intl Airport to Lambert-St Louis Airport?
The number of operators available for flights from Appleton Intl Airport to Lambert-St Louis Airport is 3 as of August 2025.
How old do you have to be to fly from Appleton Intl Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Appleton Intl 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.
What is the most popular airline from Appleton to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Appleton to St. Louis is American Airlines (47% of total bookings). The next most popular airlines are United Airlines (31%) and Delta (22%).

Best airlines flying from Appleton to St. Louis

Compare and see reviews for airlines that fly from Appleton to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $198	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights
American Airlines	PriceFrom $218	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $228	Free Cancellation	Rating 7.4 8,905 reviews	Search United Airlines flights

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Why use momondo?

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

Finding the right flight to St. Louis from Appleton is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to St. Louis from Appleton which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Appleton to St. Louis.

I’m not ready to book a flight from Appleton to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Appleton are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.