What airlines fly to St. Louis?

Southwest, American Airlines and Delta are the top three most popular airlines that fly to St. Louis from Harrisburg according to our data. Southwest is the first choice among our users, with 50% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 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 Harrisburg to Lambert-St Louis?

Delta, Frontier, and American Airlines are the most popular carriers operating from Harrisburg to Lambert-St Louis

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

Prices for flights from Harrisburg Airport to Lambert-St Louis Airport were last updated today.

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

The number of operators available for flights from Harrisburg Airport to Lambert-St Louis Airport is 3 as of July 2025.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harrisburg 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 required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$126 Cheap Flights from Harrisburg to St. Louis in 2025

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Find the cheapest flights from Harrisburg to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

7:47 am - 10:59 amMDT-STL

4h 12m1 stop

4:39 pm - 9:24 pmSTL-MDT

3h 45m1 stop

$249American Airlines

Find Deal

Wed, Nov 12 - Mon, Nov 17

6:25 pm - 11:53 pmMDT-STL

6h 28m1 stop

6:40 am - 11:53 amSTL-MDT

4h 13m1 stop

$259Delta

Find Deal

Wed, Jul 23 - Sun, Jul 27

11:25 am - 4:03 pmMDT-STL

5h 38m1 stop

5:30 am - 1:07 pmSTL-MDT

6h 37m1 stop

$274American Airlines

Find Deal

Fri, Oct 10 - Sun, Oct 12

6:25 pm - 11:53 pmMDT-STL

6h 28m1 stop

3:41 pm - 11:52 pmSTL-MDT

7h 11m1 stop

$279Delta

Find Deal

Fri, Aug 1 - Sun, Aug 3

12:28 pm - 7:07 pmMDT-STL

7h 39m2 stops

5:11 pm - 11:29 pmSTL-MDT

5h 18m1 stop

$284Delta

Find Deal

Wed, Aug 20 - Sun, Aug 24

6:00 am - 4:35 pmMDT-STL

11h 35m2 stops

3:42 pm - 10:24 pmSTL-MDT

5h 42m1 stop

$299Delta

Find Deal

Sat, Aug 23 - Mon, Aug 25

6:30 am - 12:25 pmMDT-STL

6h 55m1 stop

11:30 am - 4:52 pmSTL-MDT

4h 22m1 stop

$344United Airlines

Find Deal

Sun, Aug 24 - Sun, Aug 31

11:07 am - 9:06 amMDT-STL

22h 59m2 stops

2:02 pm - 10:12 amSTL-MDT

19h 10m1 stop

$411Frontier

Find Deal

Fri, Oct 3 - Sun, Oct 5

8:15 am - 2:20 pmMDT-STL

7h 05m1 stop

5:18 pm - 9:35 amSTL-MDT

15h 17m2 stops

$421United Airlines

Find Deal

Wed, Nov 12 - Mon, Nov 17

11:07 am - 9:06 amMDT-STL

22h 59m2 stops

10:39 am - 10:12 amSTL-MDT

22h 33m2 stops

$507Frontier

Find Deal

Fri, Oct 3 - Sun, Oct 5

American Airlines flights from Harrisburg to St. Louis

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

American Airlines

Nov 12

MDT7:47 amHarrisburg

4h 12m

1 stop

STL10:59 amLambert-St Louis

Nov 17

STL4:39 pmLambert-St Louis

3h 45m

1 stop

MDT9:24 pmHarrisburg

$249

Find similar

American Airlines

Oct 10

MDT11:25 amHarrisburg

5h 38m

1 stop

STL4:03 pmLambert-St Louis

Oct 12

STL5:30 amLambert-St Louis

6h 37m

1 stop

MDT1:07 pmHarrisburg

$274

Find similar

American Airlines

Jul 19

MDT6:36 pmHarrisburg

6h 15m

1 stop

STL11:51 pmLambert-St Louis

Jul 20

STL6:10 amLambert-St Louis

4h 30m

1 stop

MDT11:40 amHarrisburg

$470

Find similar

Frontier flights from Harrisburg to St. Louis

Our best Frontier deals on Harrisburg to St. Louis flight tickets

Frontier

Jul 17

MDT11:06 amHarrisburg

13h 41m

1 stop

STL11:47 pmLambert-St Louis

Jul 19

STL5:40 pmLambert-St Louis

15h 28m

1 stop

MDT10:08 amHarrisburg

$281

Find similar

Frontier

Oct 3

MDT11:07 amHarrisburg

22h 59m

2 stops

STL9:06 amLambert-St Louis

Oct 5

STL2:02 pmLambert-St Louis

19h 10m

1 stop

MDT10:12 amHarrisburg

$411

Find similar

Frontier

Jul 17

MDT11:06 amHarrisburg

13h 41m

1 stop

STL11:47 pmLambert-St Louis

Jul 19

STL2:52 pmLambert-St Louis

18h 16m

2 stops

MDT10:08 amHarrisburg

$424

Find similar

How to get the cheapest flight ticket from Harrisburg 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, September is the cheapest month to fly from Harrisburg to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $278. The month of April is another great option to travel to St. Louis, with average flight prices from Harrisburg averaging around $291.

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 Thursday when prices can be found for as low as $318. 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 Sunday because tickets tend to average around $762. 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 Harrisburg at noon is the least expensive time of day to depart. momondo users have found prices as low as $325 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $389 per ticket.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Harrisburg when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $336 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Harrisburg for as low as $262 on momondo.

How have Harrisburg to St. Louis flight prices changed over time?

When to book flights from Harrisburg to St. Louis

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

Estimated round-trip price

Cheap Harrisburg to St. Louis (MDT to STL) flight deals and tips

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

Best Price Found	$126
Fastest flight time	4h 12m
Direct flights	None
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from Harrisburg in the past 72 hours is $126. The best round-trip flight deal from Harrisburg to St. Louis found on momondo in the last 72 hours is $249.

The fastest flight from Harrisburg to St. Louis takes 4h 12m

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

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

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How far is Harrisburg to Lambert-St Louis by plane?
There are 718.1 mi between Harrisburg and Lambert-St Louis. Typically, this will take 4h 12m by plane in normal conditions.
When did momondo last update prices for flights from Harrisburg Airport to Lambert-St Louis Airport?
Prices for flights from Harrisburg Airport to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from Harrisburg Airport to Lambert-St Louis Airport?
The number of operators available for flights from Harrisburg Airport to Lambert-St Louis Airport is 3 as of July 2025.
How old do you have to be to fly from Harrisburg Airport to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harrisburg 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 required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Harrisburg to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Harrisburg to St. Louis is American Airlines (60% of total bookings). The next most popular airlines are Delta (21%) and United Airlines (18%).

Best airlines flying from Harrisburg to St. Louis

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $238	Free Cancellation	Rating 8.0 7,952 reviews	Search Delta flights
American Airlines	PriceFrom $248	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $258	Free Cancellation	Rating 7.4 8,846 reviews	Search United Airlines flights

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Why use momondo?

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

Finding the right flight to St. Louis from Harrisburg 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 Harrisburg to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Harrisburg to St. Louis flights to just show those with flexible booking policies.

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

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

Price alerts on flights to St. Louis from Harrisburg 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.