What airlines fly to Harrisburg?

Southwest, American Airlines and Delta 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 58% 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.

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

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

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 February 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.

$132 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 $264 to $318. The lowest price recently found on this route was $234.

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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.

3:49 pm - 10:32 am

STL

MDT

17h 43m

1 stop

10:16 pm - 7:02 am

MDT

STL

9h 46m

1 stop

$234Frontier

Mon, Mar 2 - Sun, Mar 8

3:49 pm - 10:32 am

STL

MDT

17h 43m

1 stop

10:16 pm - 1:19 pm

MDT

STL

16h 03m

2 stops

$235Frontier

Mon, Mar 2 - Sun, Mar 8

4:51 pm - 5:11 pm

STL

MDT

23h 20m

1 stop

5:26 pm - 10:32 am

MDT

STL

18h 06m

2 stops

$237Multiple Airlines

Mon, Mar 9 - Mon, Mar 23

4:51 pm - 5:11 pm

STL

MDT

23h 20m

1 stop

10:18 pm - 10:31 am

MDT

STL

37h 13m

2 stops

$244Multiple Airlines

Mon, Mar 9 - Tue, Mar 24

12:04 pm - 5:47 pm

STL

MDT

4h 43m

1 stop

6:32 pm - 11:58 pm

MDT

STL

6h 26m

1 stop

$251Delta

Tue, Mar 24 - Tue, Apr 7

6:00 am - 12:39 pm

STL

MDT

5h 39m

1 stop

6:10 am - 9:46 am

MDT

STL

4h 36m

1 stop

$260Delta

Thu, Mar 26 - Sat, Apr 4

7:52 am - 9:28 pm

STL

MDT

12h 36m

1 stop

5:26 pm - 10:32 am

MDT

STL

18h 06m

2 stops

$270Multiple Airlines

Sun, Mar 8 - Mon, Mar 23

7:52 am - 9:28 pm

STL

MDT

12h 36m

1 stop

10:13 pm - 10:32 am

MDT

STL

37h 19m

2 stops

$275Multiple Airlines

Sun, Mar 8 - Sun, Mar 22

7:52 am - 9:28 pm

STL

MDT

12h 36m

1 stop

10:18 pm - 10:31 am

MDT

STL

37h 13m

2 stops

$277Multiple Airlines

Sun, Mar 8 - Tue, Mar 24

9:10 am - 4:51 pm

STL

MDT

6h 41m

1 stop

6:15 am - 10:45 am

MDT

STL

5h 30m

1 stop

$279United Airlines

Wed, Apr 22 - Sun, Apr 26

Frontier flights from St. Louis to Harrisburg

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

Frontier

Mar 2

STL3:49 pmLambert-St Louis

17h 43m

1 stop

MDT10:32 amHarrisburg

Mar 8

MDT10:16 pmHarrisburg

9h 46m

1 stop

STL7:02 amLambert-St Louis

$234

Frontier

Mar 2

STL3:49 pmLambert-St Louis

17h 43m

1 stop

MDT10:32 amHarrisburg

Mar 8

MDT10:16 pmHarrisburg

16h 03m

2 stops

STL1:19 pmLambert-St Louis

$235

Frontier

Apr 10

STL4:54 pmLambert-St Louis

22h 53m

1 stop

MDT4:47 pmHarrisburg

Apr 12

MDT10:06 pmHarrisburg

10h 45m

1 stop

STL7:51 amLambert-St Louis

$290

Delta flights from St. Louis to Harrisburg

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

Delta

Mar 25

STL6:00 amLambert-St Louis

5h 39m

1 stop

MDT12:39 pmHarrisburg

Apr 1

MDT6:10 amHarrisburg

4h 36m

1 stop

STL9:46 amLambert-St Louis

$251

Delta

Mar 26

STL6:00 amLambert-St Louis

5h 39m

1 stop

MDT12:39 pmHarrisburg

Apr 1

MDT6:10 amHarrisburg

4h 36m

1 stop

STL9:46 amLambert-St Louis

$260

Delta

Mar 8

STL6:00 amLambert-St Louis

5h 39m

1 stop

MDT12:39 pmHarrisburg

Mar 18

MDT6:32 pmHarrisburg

6h 26m

1 stop

STL11:58 pmLambert-St Louis

$285

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 3/2

3:49 pm-10:32 am

1 stop17h 43m

Harrisburg

Sun 3/8

10:16 pm-7:02 am

1 stop9h 46m

$234

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 3/2

3:49 pm-10:32 am

1 stop17h 43m

Harrisburg

Sun 3/8

10:16 pm-1:19 pm

2 stops16h 03m

$235

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 3/9

4:51 pm-5:11 pm

1 stop23h 20m

Harrisburg

Mon 3/23

5:26 pm-10:32 am

2 stops18h 06m

$237

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 3/9

4:51 pm-5:11 pm

1 stop23h 20m

Harrisburg

Tue 3/24

10:18 pm-10:31 am

2 stops37h 13m

$244

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 3/24

12:04 pm-5:47 pm

1 stop4h 43m

Harrisburg

Tue 4/7

6:32 pm-11:58 pm

1 stop6h 26m

$251

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 3/26

6:00 am-12:39 pm

1 stop5h 39m

Harrisburg

Sat 4/4

6:10 am-9:46 am

1 stop4h 36m

$260

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 3/8

7:52 am-9:28 pm

1 stop12h 36m

Harrisburg

Mon 3/23

5:26 pm-10:32 am

2 stops18h 06m

$270

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 3/8

7:52 am-9:28 pm

1 stop12h 36m

Harrisburg

Sun 3/22

10:13 pm-10:32 am

2 stops37h 19m

$275

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 3/8

7:52 am-9:28 pm

1 stop12h 36m

Harrisburg

Tue 3/24

10:18 pm-10:31 am

2 stops37h 13m

$277

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 4/22

9:10 am-4:51 pm

1 stop6h 41m

Harrisburg

Sun 4/26

6:15 am-10:45 am

1 stop5h 30m

$279

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 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 July is, on average, the cheapest month to fly to Harrisburg from St. Louis, with most prices found around $279. If you aren’t able to travel to Harrisburg during the month of July, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $283.

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

As of February 2026, prices for St. Louis to Harrisburg flights are approximately 36% cheaper 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	4h 36m
Direct flights	None

The fastest flight from St. Louis to Harrisburg takes 4h 36m

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

Search flight deals

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 4h 36m 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 February 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 (61% of total bookings). The next most popular airlines are Delta (25%) and United Airlines (14%).

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 7.2 11,217 reviews	Search American Airlines flights
Delta	PriceFrom $248	Free Cancellation	Rating 7.9 8,138 reviews	Search Delta flights
United Airlines	PriceFrom $251	Free Cancellation	Rating 7.4 9,236 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.