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

Delta and American Airlines are the most popular carriers operating from Appleton Intl to Lambert-St Louis

What airlines fly to St. Louis?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Appleton according to our data. United Airlines is the first choice among our users, with 32% 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.

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 January 2026.

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.

$126 Cheap Flights from Appleton to St. Louis in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Appleton to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:23 pm - 9:40 pm

ATW

STL

4h 17m

1 stop

7:41 am - 11:58 am

STL

ATW

4h 17m

1 stop

$249United Airlines

Fri, Feb 20 - Sun, Feb 22

5:23 pm - 10:58 pm

ATW

STL

5h 35m

1 stop

9:55 am - 3:07 pm

STL

ATW

5h 12m

1 stop

$259United Airlines

Tue, Feb 10 - Sat, Feb 14

11:25 am - 6:16 pm

ATW

STL

6h 51m

1 stop

9:15 am - 6:02 pm

STL

ATW

8h 47m

2 stops

$264American Airlines

Tue, Feb 10 - Sat, Feb 14

5:23 pm - 9:42 pm

ATW

STL

4h 19m

1 stop

7:41 am - 2:03 pm

STL

ATW

6h 22m

1 stop

$266United Airlines

Fri, Mar 6 - Sun, Mar 8

6:39 pm - 11:48 pm

ATW

STL

5h 09m

1 stop

8:00 am - 12:51 pm

STL

ATW

4h 51m

1 stop

$270American Airlines

Thu, Feb 26 - Sat, Feb 28

5:23 pm - 9:07 pm

ATW

STL

3h 44m

1 stop

5:00 am - 8:21 am

STL

ATW

3h 21m

1 stop

$271United Airlines

Sun, Mar 15 - Sat, Mar 21

7:00 am - 12:58 pm

ATW

STL

5h 58m

1 stop

6:32 am - 10:32 am

STL

ATW

4h 00m

1 stop

$284Delta

Fri, Apr 3 - Mon, Apr 6

11:03 am - 4:37 pm

ATW

STL

5h 34m

1 stop

11:23 am - 3:40 pm

STL

ATW

4h 17m

1 stop

$299Delta

Wed, Feb 4 - Sat, Feb 7

2:39 pm - 9:23 pm

ATW

STL

6h 44m

1 stop

7:45 am - 11:48 am

STL

ATW

4h 03m

1 stop

$302United Airlines

Fri, Mar 27 - Sun, Mar 29

7:15 am - 3:04 pm

ATW

STL

7h 49m

2 stops

8:31 am - 12:09 pm

STL

ATW

3h 38m

1 stop

$304American Airlines

Wed, Feb 4 - Sat, Feb 7

United Airlines flights from Appleton to St. Louis

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

United Airlines

May 1

ATW5:33 pmAppleton Intl

3h 35m

1 stop

STL9:08 pmLambert-St Louis

May 5

STL11:15 amLambert-St Louis

5h 35m

1 stop

ATW4:50 pmAppleton Intl

$249

United Airlines

Mar 15

ATW5:23 pmAppleton Intl

3h 44m

1 stop

STL9:07 pmLambert-St Louis

Mar 21

STL5:00 amLambert-St Louis

3h 21m

1 stop

ATW8:21 amAppleton Intl

$271

United Airlines

Mar 27

ATW2:39 pmAppleton Intl

6h 44m

1 stop

STL9:23 pmLambert-St Louis

Mar 29

STL7:45 amLambert-St Louis

4h 03m

1 stop

ATW11:48 amAppleton Intl

$302

American Airlines flights from Appleton to St. Louis

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

American Airlines

Feb 26

ATW6:39 pmAppleton Intl

5h 09m

1 stop

STL11:48 pmLambert-St Louis

Feb 28

STL8:00 amLambert-St Louis

4h 51m

1 stop

ATW12:51 pmAppleton Intl

$270

American Airlines

Feb 26

ATW6:39 pmAppleton Intl

5h 09m

1 stop

STL11:48 pmLambert-St Louis

Feb 28

STL7:05 amLambert-St Louis

10h 57m

2 stops

ATW6:02 pmAppleton Intl

$309

American Airlines

Jan 31

ATW12:39 pmAppleton Intl

5h 34m

1 stop

STL6:13 pmLambert-St Louis

Feb 4

STL10:17 amLambert-St Louis

7h 34m

2 stops

ATW5:51 pmAppleton Intl

$314

Fly from

Fly to

Route

Depart

Return

Price

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Fri 2/20

5:23 pm-9:40 pm

1 stop4h 17m

Lambert-St Louis

Sun 2/22

7:41 am-11:58 am

1 stop4h 17m

$249

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Tue 2/10

5:23 pm-10:58 pm

1 stop5h 35m

Lambert-St Louis

Sat 2/14

9:55 am-3:07 pm

1 stop5h 12m

$259

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Tue 2/10

11:25 am-6:16 pm

1 stop6h 51m

Lambert-St Louis

Sat 2/14

9:15 am-6:02 pm

2 stops8h 47m

$264

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Fri 3/6

5:23 pm-9:42 pm

1 stop4h 19m

Lambert-St Louis

Sun 3/8

7:41 am-2:03 pm

1 stop6h 22m

$266

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Thu 2/26

6:39 pm-11:48 pm

1 stop5h 09m

Lambert-St Louis

Sat 2/28

8:00 am-12:51 pm

1 stop4h 51m

$270

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Sun 3/15

5:23 pm-9:07 pm

1 stop3h 44m

Lambert-St Louis

Sat 3/21

5:00 am-8:21 am

1 stop3h 21m

$271

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Fri 4/3

7:00 am-12:58 pm

1 stop5h 58m

Lambert-St Louis

Mon 4/6

6:32 am-10:32 am

1 stop4h 00m

$284

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Wed 2/4

11:03 am-4:37 pm

1 stop5h 34m

Lambert-St Louis

Sat 2/7

11:23 am-3:40 pm

1 stop4h 17m

$299

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Fri 3/27

2:39 pm-9:23 pm

1 stop6h 44m

Lambert-St Louis

Sun 3/29

7:45 am-11:48 am

1 stop4h 03m

$302

AppletonSt. Louis

ATW - STL

ATWSTL

Appleton Intl

Wed 2/4

7:15 am-3:04 pm

2 stops7h 49m

Lambert-St Louis

Sat 2/7

8:31 am-12:09 pm

1 stop3h 38m

$304

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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, November 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 $268. The month of August is another great option to travel to St. Louis, with average flight prices from Appleton averaging around $271.

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

Fastest flight time	3h 35m
Direct flights	None

The fastest flight from Appleton to St. Louis takes 3h 35m

There are no direct flights from Appleton to St. Louis. There are no popular flight routes from Appleton to St. Louis.

Search flight deals

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 35m.
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 January 2026.
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 (43% of total bookings). The next most popular airlines are Delta (28%) and United Airlines (28%).

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 $213	Free Cancellation	Rating 7.9 8,128 reviews	Search Delta flights
American Airlines	PriceFrom $228	Free Cancellation	Rating 7.2 11,205 reviews	Search American Airlines flights
United Airlines	PriceFrom $278	Free Cancellation	Rating 7.4 9,215 reviews	Search United Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

Florissant

O'Fallon

Collinsville

Fenton

St. Peters

Wentzville

Alton

Farmington

Clayton

Edwardsville

Eureka

Festus

Glencoe

Litchfield

Shrewsbury

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.