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

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

What airlines fly to Harrisburg?

Southwest, American Airlines and Frontier are the top three most popular airlines that fly to Harrisburg from St. Louis according to our data. Southwest is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Harrisburg. Keep in mind that there are 5 different airlines that fly to Harrisburg on a routine basis, so you have a few additional options to choose from.

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

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

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

The number of operators available for flights from Lambert-St Louis Airport to Harrisburg Airport is 3 as of July 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Harrisburg Airport.

What documentation or ID do you need to fly to Harrisburg Airport?

The travel and health documents you'll need for your trip to Harrisburg 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 Harrisburg Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$240 Cheap Flights from St. Louis to Harrisburg in 2026

Q: What is the typical price of a round-trip flight between St. Louis and Harrisburg?

Prices are currently low for flights on this route. Typical prices usually range from $299 to $471. The lowest price recently found on this route was $291.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Harrisburg

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 11:49 am

STL

MDT

4h 49m

1 stop

12:15 pm - 3:14 pm

MDT

STL

3h 59m

1 stop

$291Delta

Sat, Sep 5 - Wed, Sep 9

6:00 am - 11:45 am

STL

MDT

4h 45m

1 stop

7:34 pm - 11:34 pm

MDT

STL

5h 00m

1 stop

$300American Airlines

Thu, Aug 13 - Sat, Aug 15

6:25 pm - 11:21 pm

STL

MDT

3h 56m

1 stop

6:00 am - 11:46 am

MDT

STL

6h 46m

1 stop

$309Delta

Fri, Aug 21 - Sun, Aug 23

6:30 am - 12:03 pm

STL

MDT

4h 33m

1 stop

5:18 pm - 8:42 pm

MDT

STL

4h 24m

1 stop

$325Delta

Sat, Aug 1 - Sat, Aug 8

6:16 pm - 12:22 am

STL

MDT

5h 06m

1 stop

7:38 pm - 11:32 pm

MDT

STL

4h 54m

1 stop

$339American Airlines

Fri, Jul 17 - Sun, Jul 19

6:14 am - 1:55 pm

STL

MDT

6h 41m

1 stop

7:45 pm - 12:16 am

MDT

STL

5h 31m

1 stop

$369American Airlines

Sun, Jul 26 - Sun, Aug 2

1:25 pm - 9:50 pm

STL

MDT

7h 25m

1 stop

8:15 am - 12:06 pm

MDT

STL

4h 51m

1 stop

$371United Airlines

Sat, Oct 24 - Wed, Oct 28

6:14 am - 2:00 pm

STL

MDT

6h 46m

1 stop

7:45 pm - 12:16 am

MDT

STL

5h 31m

1 stop

$389American Airlines

Thu, Jul 16 - Sun, Jul 19

1:13 pm - 9:29 pm

STL

MDT

7h 16m

1 stop

2:11 pm - 6:13 pm

MDT

STL

5h 02m

1 stop

$439United Airlines

Tue, Jul 14 - Sat, Jul 18

9:04 am - 4:52 pm

STL

MDT

6h 48m

1 stop

6:15 am - 3:41 pm

MDT

STL

10h 26m

2 stops

$453United Airlines

Sat, Oct 24 - Wed, Oct 28

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American Airlines flights from St. Louis to Harrisburg

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

American Airlines

Aug 13

STL6:00 amLambert-St Louis

4h 45m

1 stop

MDT11:45 amHarrisburg

Aug 15

MDT7:34 pmHarrisburg

5h 00m

1 stop

STL11:34 pmLambert-St Louis

$300

American Airlines

Jul 17

STL6:16 pmLambert-St Louis

5h 06m

1 stop

MDT12:22 amHarrisburg

Jul 19

MDT7:38 pmHarrisburg

4h 54m

1 stop

STL11:32 pmLambert-St Louis

$339

American Airlines

Jul 26

STL6:14 amLambert-St Louis

6h 41m

1 stop

MDT1:55 pmHarrisburg

Aug 2

MDT7:45 pmHarrisburg

5h 31m

1 stop

STL12:16 amLambert-St Louis

$369

United Airlines flights from St. Louis to Harrisburg

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

United Airlines

Oct 24

STL1:25 pmLambert-St Louis

7h 25m

1 stop

MDT9:50 pmHarrisburg

Oct 28

MDT8:15 amHarrisburg

4h 51m

1 stop

STL12:06 pmLambert-St Louis

$371

United Airlines

Jul 3

STL7:20 amLambert-St Louis

5h 14m

1 stop

MDT1:34 pmHarrisburg

Jul 6

MDT10:40 amHarrisburg

6h 06m

1 stop

STL3:46 pmLambert-St Louis

$414

United Airlines

Jul 14

STL1:13 pmLambert-St Louis

7h 16m

1 stop

MDT9:29 pmHarrisburg

Jul 18

MDT2:11 pmHarrisburg

5h 02m

1 stop

STL6:13 pmLambert-St Louis

$439

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 9/5

6:00 am-11:49 am

1 stop4h 49m

Harrisburg

Wed 9/9

12:15 pm-3:14 pm

1 stop3h 59m

$291

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 8/13

6:00 am-11:45 am

1 stop4h 45m

Harrisburg

Sat 8/15

7:34 pm-11:34 pm

1 stop5h 00m

$300

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 8/21

6:25 pm-11:21 pm

1 stop3h 56m

Harrisburg

Sun 8/23

6:00 am-11:46 am

1 stop6h 46m

$309

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 8/1

6:30 am-12:03 pm

1 stop4h 33m

Harrisburg

Sat 8/8

5:18 pm-8:42 pm

1 stop4h 24m

$325

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 7/17

6:16 pm-12:22 am

1 stop5h 06m

Harrisburg

Sun 7/19

7:38 pm-11:32 pm

1 stop4h 54m

$339

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 7/26

6:14 am-1:55 pm

1 stop6h 41m

Harrisburg

Sun 8/2

7:45 pm-12:16 am

1 stop5h 31m

$369

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 10/24

1:25 pm-9:50 pm

1 stop7h 25m

Harrisburg

Wed 10/28

8:15 am-12:06 pm

1 stop4h 51m

$371

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 7/16

6:14 am-2:00 pm

1 stop6h 46m

Harrisburg

Sun 7/19

7:45 pm-12:16 am

1 stop5h 31m

$389

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 7/14

1:13 pm-9:29 pm

1 stop7h 16m

Harrisburg

Sat 7/18

2:11 pm-6:13 pm

1 stop5h 02m

$439

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 10/24

9:04 am-4:52 pm

1 stop6h 48m

Harrisburg

Wed 10/28

6:15 am-3:41 pm

2 stops10h 26m

$453

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first

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

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 typical price of a round-trip flight between St. Louis and Harrisburg?

What is the cheapest month to fly to Harrisburg?

The month of April is, on average, the cheapest month to fly to Harrisburg from St. Louis, with most prices found around $270. If you aren’t able to travel to Harrisburg during the month of April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $289.

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

As of July 2026, prices for St. Louis to Harrisburg flights are approximately 54% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Harrisburg

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

Estimated round-trip price

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

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

Fastest flight time	3h 56m
Direct flights	None

The fastest flight from St. Louis to Harrisburg takes 3h 56m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Harrisburg

How far is Lambert-St Louis to Harrisburg by plane?
The straight-line distance from Lambert-St Louis to Harrisburg is 718.1 mi. Typically, this will take 3h 56m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Harrisburg Airport?
Prices for flights from Lambert-St Louis Airport to Harrisburg Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Harrisburg Airport?
The number of operators available for flights from Lambert-St Louis Airport to Harrisburg Airport is 3 as of July 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Harrisburg Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Harrisburg Airport.
What documentation or ID do you need to fly to Harrisburg Airport?
The travel and health documents you'll need for your trip to Harrisburg 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 Harrisburg 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 St. Louis to Harrisburg?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Harrisburg is American Airlines (62% of total bookings). The next most popular airlines are Delta (20%) and United Airlines (18%).

Best airlines flying from St. Louis to Harrisburg

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

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $248	Free Cancellation	Rating 7.1 11,770 reviews	Search American Airlines flights
Delta	PriceFrom $248	Free Cancellation	Rating 7.8 8,452 reviews	Search Delta flights
United Airlines	PriceFrom $260	Free Cancellation	Rating 7.4 9,926 reviews	Search United Airlines flights

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Why use momondo?

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

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

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

Yes. All flights to Harrisburg from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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

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