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 51% 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?

United Airlines 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 August 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.

$170 Cheap Flights from St. Louis to Harrisburg in 2026

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.

5:00 am - 11:23 amSTL Lambert-St Louis-MDT Harrisburg

5h 23m1 stop Chicago O'Hare Intl

6:00 am - 10:50 amMDT Harrisburg-STL Lambert-St Louis

5h 50m1 stop Chicago O'Hare Intl

$301American Airlines

Sat, Oct 3 - Sat, Oct 10

6:39 pm - 8:18 amSTL Lambert-St Louis-MDT Harrisburg

12h 39m1 stop Orlando

7:13 pm - 1:10 pmMDT Harrisburg-STL Lambert-St Louis

18h 57m2 stops Orlando Sanford Intl Atlanta Hartsfield-Jackson

$301Multiple Airlines

Thu, Sep 10 - Sun, Sep 13

5:18 pm - 11:53 pmSTL Lambert-St Louis-MDT Harrisburg

5h 35m1 stop Chicago O'Hare Intl

6:00 am - 10:18 amMDT Harrisburg-STL Lambert-St Louis

5h 18m1 stop Chicago O'Hare Intl

$310American Airlines

Fri, Sep 18 - Sat, Sep 19

8:40 am - 1:39 pmSTL Lambert-St Louis-MDT Harrisburg

3h 59m1 stop Washington, D.C. Dulles Intl

5:54 pm - 9:36 pmMDT Harrisburg-STL Lambert-St Louis

4h 42m1 stop Chicago O'Hare Intl

$319United Airlines

Thu, Sep 10 - Sun, Sep 13

6:00 am - 12:45 pmSTL Lambert-St Louis-MDT Harrisburg

5h 45m1 stop Chicago O'Hare Intl

7:31 pm - 12:14 amMDT Harrisburg-STL Lambert-St Louis

5h 43m1 stop Chicago O'Hare Intl

$319American Airlines

Thu, Sep 3 - Mon, Sep 7

7:25 am - 1:32 pmSTL Lambert-St Louis-MDT Harrisburg

5h 07m1 stop Chicago O'Hare Intl

6:30 am - 12:02 pmMDT Harrisburg-STL Lambert-St Louis

6h 32m1 stop Chicago O'Hare Intl

$334United Airlines

Sun, Aug 30 - Sun, Sep 13

12:59 pm - 8:53 pmSTL Lambert-St Louis-MDT Harrisburg

6h 54m1 stop Chicago O'Hare Intl

10:40 am - 3:38 pmMDT Harrisburg-STL Lambert-St Louis

5h 58m1 stop Chicago O'Hare Intl

$349United Airlines

Sat, Aug 29 - Wed, Sep 2

3:20 pm - 11:12 pmSTL Lambert-St Louis-MDT Harrisburg

6h 52m2 stops Minneapolis St Paul Detroit Metropolitan Wayne County

6:00 am - 11:15 amMDT Harrisburg-STL Lambert-St Louis

6h 15m1 stop Atlanta Hartsfield-Jackson

$1,302Delta

Sat, Nov 21 - Sun, Nov 29

6:20 am - 4:18 pmSTL Lambert-St Louis-MDT Harrisburg

8h 58m2 stops Minneapolis St Paul Detroit Metropolitan Wayne County

6:00 am - 9:19 amMDT Harrisburg-STL Lambert-St Louis

4h 19m1 stop Detroit Metropolitan Wayne County

$1,302Delta

Sat, Nov 21 - Sun, Nov 29

6:20 am - 4:18 pmSTL Lambert-St Louis-MDT Harrisburg

8h 58m2 stops Minneapolis St Paul Detroit Metropolitan Wayne County

6:00 am - 9:19 amMDT Harrisburg-STL Lambert-St Louis

4h 19m1 stop Detroit Metropolitan Wayne County

$1,332Delta

Sun, Nov 22 - Sun, Nov 29

Cheap last minute flights

Enter your travel dates to find the best prices.

5:42 pm - 11:03 pmSTL Lambert-St Louis-MDT Harrisburg

4h 21m1 stop Philadelphia

7:34 pm - 11:34 pmMDT Harrisburg-STL Lambert-St Louis

5h 00m1 stop Philadelphia

$378American Airlines

Sat, Aug 22 - Sat, Aug 29

6:00 am - 1:58 pmSTL Lambert-St Louis-MDT Harrisburg

6h 58m1 stop Philadelphia

7:31 pm - 11:58 pmMDT Harrisburg-STL Lambert-St Louis

5h 27m1 stop Chicago O'Hare Intl

$409American Airlines

Fri, Aug 21 - Sun, Aug 23

6:25 pm - 11:21 pmSTL Lambert-St Louis-MDT Harrisburg

3h 56m1 stop Detroit Metropolitan Wayne County

6:15 am - 9:37 amMDT Harrisburg-STL Lambert-St Louis

4h 22m1 stop Detroit Metropolitan Wayne County

$409Delta

Fri, Aug 21 - Sun, Aug 23

6:30 am - 11:41 amSTL Lambert-St Louis-MDT Harrisburg

4h 11m1 stop Detroit Metropolitan Wayne County

6:15 am - 9:37 amMDT Harrisburg-STL Lambert-St Louis

4h 22m1 stop Detroit Metropolitan Wayne County

$409Delta

Fri, Aug 21 - Sun, Aug 23

6:25 pm - 11:21 pmSTL Lambert-St Louis-MDT Harrisburg

3h 56m1 stop Detroit Metropolitan Wayne County

6:15 am - 9:37 amMDT Harrisburg-STL Lambert-St Louis

4h 22m1 stop Detroit Metropolitan Wayne County

$424Delta

Fri, Aug 21 - Sun, Aug 23

3:32 pm - 8:53 pmSTL Lambert-St Louis-MDT Harrisburg

4h 21m1 stop Chicago O'Hare Intl

7:59 pm - 12:02 pmMDT Harrisburg-STL Lambert-St Louis

17h 03m3 stops Washington, D.C. Dulles Intl Cleveland Hopkins Intl Chicago O'Hare Intl

$613United Airlines

Sat, Aug 22 - Sat, Aug 29

11:25 am - 11:10 pmSTL Lambert-St Louis-MDT Harrisburg

10h 45m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

2:52 pm - 7:11 pmMDT Harrisburg-STL Lambert-St Louis

5h 19m1 stop Washington, D.C. Dulles Intl

$676United Airlines

Sat, Aug 22 - Sat, Aug 29

6:00 am - 1:32 pmSTL Lambert-St Louis-MDT Harrisburg

6h 32m1 stop Chicago O'Hare Intl

7:59 pm - 12:03 pmMDT Harrisburg-STL Lambert-St Louis

17h 04m3 stops Washington, D.C. Dulles Intl Cleveland Hopkins Intl Chicago O'Hare Intl

$707United Airlines

Thu, Aug 20 - Fri, Aug 21

10:53 am - 4:52 pmSTL Lambert-St Louis-MDT Harrisburg

4h 59m1 stop Chicago O'Hare Intl

2:52 pm - 12:02 pmMDT Harrisburg-STL Lambert-St Louis

22h 10m3 stops Washington, D.C. Dulles Intl Cleveland Hopkins Intl Chicago O'Hare Intl

$733United Airlines

Fri, Aug 21 - Sun, Aug 23

6:20 am - 3:50 pmSTL Lambert-St Louis-MDT Harrisburg

8h 30m2 stops Minneapolis St Paul Detroit Metropolitan Wayne County

6:15 am - 3:10 pmMDT Harrisburg-STL Lambert-St Louis

9h 55m2 stops Detroit Metropolitan Wayne County Minneapolis St Paul

$1,904Delta

Fri, Aug 21 - Sun, Aug 23

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United Airlines flights from St. Louis to Harrisburg

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

United Airlines

Aug 30

STL7:25 amLambert-St Louis

5h 07m

1 stop

MDT1:32 pmHarrisburg

Sep 13

MDT6:30 amHarrisburg

6h 32m

1 stop

STL12:02 pmLambert-St Louis

$334

United Airlines

Aug 29

STL12:59 pmLambert-St Louis

6h 54m

1 stop

MDT8:53 pmHarrisburg

Sep 2

MDT10:40 amHarrisburg

5h 58m

1 stop

STL3:38 pmLambert-St Louis

$349

United Airlines

Nov 14

STL3:15 pmLambert-St Louis

4h 58m

1 stop

MDT9:13 pmHarrisburg

Nov 18

MDT5:48 pmHarrisburg

5h 36m

1 stop

STL10:24 pmLambert-St Louis

$381

American Airlines flights from St. Louis to Harrisburg

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

American Airlines

Sep 18

STL5:18 pmLambert-St Louis

5h 35m

1 stop

MDT11:53 pmHarrisburg

Sep 19

MDT6:00 amHarrisburg

5h 18m

1 stop

STL10:18 amLambert-St Louis

$310

American Airlines

Sep 3

STL6:00 amLambert-St Louis

5h 45m

1 stop

MDT12:45 pmHarrisburg

Sep 7

MDT7:31 pmHarrisburg

5h 43m

1 stop

STL12:14 amLambert-St Louis

$319

American Airlines

Sep 3

STL6:00 amLambert-St Louis

5h 45m

1 stop

MDT12:45 pmHarrisburg

Sep 7

MDT7:31 pmHarrisburg

5h 43m

1 stop

STL12:14 amLambert-St Louis

$334

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 10/3

5:00 am-11:23 am

1 stop5h 23m

Harrisburg

Sat 10/10

6:00 am-10:50 am

1 stop5h 50m

$301

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Thu 9/10

6:39 pm-8:18 am

1 stop12h 39m

Harrisburg

Sun 9/13

7:13 pm-1:10 pm

2 stops18h 57m

$301

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Fri 9/18

5:18 pm-11:53 pm

1 stop5h 35m

Harrisburg

Sat 9/19

6:00 am-10:18 am

1 stop5h 18m

$310

Quickest round-trip

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Thu 9/10

8:40 am-1:39 pm

1 stop3h 59m

Harrisburg

Sun 9/13

5:54 pm-9:36 pm

1 stop4h 42m

$319

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Thu 9/3

6:00 am-12:45 pm

1 stop5h 45m

Harrisburg

Mon 9/7

7:31 pm-12:14 am

1 stop5h 43m

$319

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sun 8/30

7:25 am-1:32 pm

1 stop5h 07m

Harrisburg

Sun 9/13

6:30 am-12:02 pm

1 stop6h 32m

$334

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 8/29

12:59 pm-8:53 pm

1 stop6h 54m

Harrisburg

Wed 9/2

10:40 am-3:38 pm

1 stop5h 58m

$349

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 11/21

3:20 pm-11:12 pm

2 stops6h 52m

Harrisburg

Sun 11/29

6:00 am-11:15 am

1 stop6h 15m

$1,302

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 11/21

6:20 am-4:18 pm

2 stops8h 58m

Harrisburg

Sun 11/29

6:00 am-9:19 am

1 stop4h 19m

$1,302

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sun 11/22

6:20 am-4:18 pm

2 stops8h 58m

Harrisburg

Sun 11/29

6:00 am-9:19 am

1 stop4h 19m

$1,332

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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?

Prices are currently low for flights on this route.

Typical prices usually range from $309 to $448.
The lowest price recently found on this route was $301.

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 August 2026, prices for St. Louis to Harrisburg flights are approximately 25% 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

Best Price Found	$170
Fastest flight time	4h 17m
Direct flights	None

The best one-way flight to Harrisburg from St. Louis in the past 72 hours is $170. The best round-trip flight deal from St. Louis to Harrisburg found on momondo in the last 72 hours is $301.

The fastest flight from St. Louis to Harrisburg takes 4h 17m

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 4h 17m 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 August 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 (54% of total bookings). The next most popular airlines are United Airlines (24%) and Delta (22%).

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 11,944 reviews	Search American Airlines flights
Delta	PriceFrom $248	Free Cancellation	Rating 7.8 8,503 reviews	Search Delta flights
United Airlines	PriceFrom $281	Free Cancellation	Rating 7.4 10,106 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.