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 United Airlines 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 54% 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 September 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.

$162 Cheap Flights from St. Louis to Harrisburg in 2026/27

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 - 11:17 amSTL Lambert-St Louis-MDT Harrisburg

5h 17m1 stop Chicago O'Hare Intl

7:52 pm - 11:59 pmMDT Harrisburg-STL Lambert-St Louis

5h 07m1 stop Chicago O'Hare Intl

$321American Airlines

Sat, Oct 31 - Wed, Nov 4

1:09 pm - 8:55 pmSTL Lambert-St Louis-MDT Harrisburg

6h 46m1 stop Chicago O'Hare Intl

8:32 am - 12:13 pmMDT Harrisburg-STL Lambert-St Louis

4h 41m1 stop Chicago O'Hare Intl

$321United Airlines

Sat, Jan 16 - Wed, Jan 20

7:29 am - 2:45 pmSTL Lambert-St Louis-MDT Harrisburg

6h 16m1 stop Chicago O'Hare Intl

7:52 pm - 11:55 pmMDT Harrisburg-STL Lambert-St Louis

5h 03m1 stop Chicago O'Hare Intl

$330American Airlines

Sat, Oct 31 - Thu, Nov 5

5:00 am - 11:17 amSTL Lambert-St Louis-MDT Harrisburg

5h 17m1 stop Chicago O'Hare Intl

7:52 pm - 11:55 pmMDT Harrisburg-STL Lambert-St Louis

5h 03m1 stop Chicago O'Hare Intl

$339American Airlines

Thu, Oct 29 - Sun, Nov 1

6:06 pm - 11:15 pmSTL Lambert-St Louis-MDT Harrisburg

4h 09m1 stop Detroit Metropolitan Wayne County

6:10 am - 10:05 amMDT Harrisburg-STL Lambert-St Louis

4h 55m1 stop Detroit Metropolitan Wayne County

$350Delta

Sat, Dec 19 - Mon, Dec 28

1:08 pm - 6:57 pmSTL Lambert-St Louis-MDT Harrisburg

4h 49m1 stop Chicago O'Hare Intl

10:43 am - 2:29 pmMDT Harrisburg-STL Lambert-St Louis

4h 46m1 stop Chicago O'Hare Intl

$421United Airlines

Wed, Oct 28 - Sat, Oct 31

10:50 am - 7:05 pmSTL Lambert-St Louis-MDT Harrisburg

7h 15m1 stop Chicago O'Hare Intl

6:30 am - 12:13 pmMDT Harrisburg-STL Lambert-St Louis

6h 43m1 stop Chicago O'Hare Intl

$421United Airlines

Wed, Jan 6 - Sat, Jan 9

6:05 pm - 8:24 pmSTL Lambert-St Louis-MDT Harrisburg

25h 19m1 stop Orlando

6:19 pm - 7:09 amMDT Harrisburg-STL Lambert-St Louis

37h 50m2 stops Tampa St. Petersburg Atlanta Hartsfield-Jackson

$666Multiple Airlines

Sat, Dec 19 - Mon, Dec 28

12:28 pm - 11:06 pmSTL Lambert-St Louis-MDT Harrisburg

9h 38m2 stops Minneapolis St Paul Detroit Metropolitan Wayne County

6:00 am - 2:41 pmMDT Harrisburg-STL Lambert-St Louis

9h 41m2 stops Detroit Metropolitan Wayne County Minneapolis St Paul

$1,411Delta

Mon, Nov 9 - Wed, Nov 11

6:00 am - 4:06 pmSTL Lambert-St Louis-MDT Harrisburg

9h 06m2 stops Atlanta Hartsfield-Jackson Detroit Metropolitan Wayne County

6:13 am - 1:39 pmMDT Harrisburg-STL Lambert-St Louis

8h 26m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

$1,494Delta

Sat, Oct 31 - Wed, Nov 4

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Delta flights from St. Louis to Harrisburg

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

Delta

Dec 19

STL6:06 pmLambert-St Louis

4h 09m

1 stop

MDT11:15 pmHarrisburg

Dec 28

MDT6:10 amHarrisburg

4h 55m

1 stop

STL10:05 amLambert-St Louis

$350

Delta

Nov 9

STL12:28 pmLambert-St Louis

9h 38m

2 stops

MDT11:06 pmHarrisburg

Nov 11

MDT6:00 amHarrisburg

9h 41m

2 stops

STL2:41 pmLambert-St Louis

$1,411

Delta

Oct 29

STL7:00 amLambert-St Louis

8h 06m

2 stops

MDT4:06 pmHarrisburg

Nov 2

MDT12:13 pmHarrisburg

8h 43m

2 stops

STL7:56 pmLambert-St Louis

$1,494

American Airlines flights from St. Louis to Harrisburg

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

American Airlines

Oct 31

STL5:00 amLambert-St Louis

5h 17m

1 stop

MDT11:17 amHarrisburg

Nov 4

MDT7:52 pmHarrisburg

5h 07m

1 stop

STL11:59 pmLambert-St Louis

$321

American Airlines

Oct 31

STL7:29 amLambert-St Louis

6h 16m

1 stop

MDT2:45 pmHarrisburg

Nov 5

MDT7:52 pmHarrisburg

5h 03m

1 stop

STL11:55 pmLambert-St Louis

$330

American Airlines

Oct 29

STL5:00 amLambert-St Louis

5h 17m

1 stop

MDT11:17 amHarrisburg

Nov 2

MDT6:34 amHarrisburg

5h 19m

1 stop

STL10:53 amLambert-St Louis

$339

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 10/31

5:00 am-11:17 am

1 stop5h 17m

Harrisburg

Wed 11/4

7:52 pm-11:59 pm

1 stop5h 07m

$321

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 1/16

1:09 pm-8:55 pm

1 stop6h 46m

Harrisburg

Wed 1/20

8:32 am-12:13 pm

1 stop4h 41m

$321

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 10/31

7:29 am-2:45 pm

1 stop6h 16m

Harrisburg

Thu 11/5

7:52 pm-11:55 pm

1 stop5h 03m

$330

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Thu 10/29

5:00 am-11:17 am

1 stop5h 17m

Harrisburg

Sun 11/1

7:52 pm-11:55 pm

1 stop5h 03m

$339

Quickest round-trip

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 12/19

6:06 pm-11:15 pm

1 stop4h 09m

Harrisburg

Mon 12/28

6:10 am-10:05 am

1 stop4h 55m

$350

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Wed 10/28

1:08 pm-6:57 pm

1 stop4h 49m

Harrisburg

Sat 10/31

10:43 am-2:29 pm

1 stop4h 46m

$421

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Wed 1/6

10:50 am-7:05 pm

1 stop7h 15m

Harrisburg

Sat 1/9

6:30 am-12:13 pm

1 stop6h 43m

$421

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 12/19

6:05 pm-8:24 pm

1 stop25h 19m

Harrisburg

Mon 12/28

6:19 pm-7:09 am

2 stops37h 50m

$666

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Mon 11/9

12:28 pm-11:06 pm

2 stops9h 38m

Harrisburg

Wed 11/11

6:00 am-2:41 pm

2 stops9h 41m

$1,411

St. LouisHarrisburg

STL Lambert-St Louis - MDT Harrisburg

STLMDT

Lambert-St Louis

Sat 10/31

6:00 am-4:06 pm

2 stops9h 06m

Harrisburg

Wed 11/4

6:13 am-1:39 pm

2 stops8h 26m

$1,494

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?

Prices are currently low for flights on this route.

Typical prices usually range from $359 to $655.
The lowest price recently found on this route was $321.

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 September 2026, prices for St. Louis to Harrisburg flights are approximately 92% 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

Best Price Found	$162
Fastest flight time	4h 06m
Direct flights	None

The best one-way flight to Harrisburg from St. Louis in the past 72 hours is $162. The best round-trip flight deal from St. Louis to Harrisburg found on momondo in the last 72 hours is $321.

The fastest flight from St. Louis to Harrisburg takes 4h 06m

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 06m 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 September 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 (49% of total bookings). The next most popular airlines are United Airlines (27%) and Delta (25%).

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
Delta	PriceFrom $250	Free Cancellation	Rating 7.8 8,608 reviews	Search Delta flights
American Airlines	PriceFrom $259	Free Cancellation	Rating 7.0 12,097 reviews	Search American Airlines flights
United Airlines	PriceFrom $281	Free Cancellation	Rating 7.4 10,261 reviews	Search United Airlines flights

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

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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.