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$160+ Cheap flights from St. Louis to Harrisburg (STL - MDT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
Mar 31 — Apr 71
Tue 3/31
Tue 4/7
1 adult, Economy
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Cheap flight deals from St. Louis to Harrisburg

Cheapest flights from St. Louis to Harrisburg
Explore the most affordable flight options available from St. Louis to Harrisburg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 1, 2026.

This Expedia deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/104:59 pm
STL
-
MDT
1 stop22h 48m
Frontier
Sun 4/1210:06 pm
MDT
-
STL
1 stop10h 45m
Frontier
Deal found 2/25$160
This CheapOair deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/274:51 pm
STL
-
MDT
1 stop27h 32m
Frontier
Fri 4/310:06 pm
MDT
-
STL
1 stop10h 45m
Frontier
Deal found 2/25$241
This American Airlines deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:32 am
STL
-
MDT
1 stop6h 25m
American Airlines
Wed 9/167:40 pm
MDT
-
STL
1 stop4h 58m
American Airlines
Deal found 2/26$251
This United Airlines deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2110:00 am
STL
-
MDT
1 stop5h 51m
United Airlines
Sun 4/266:15 am
MDT
-
STL
1 stop5h 30m
United Airlines
Deal found 2/27$260
This United Airlines deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/61:13 pm
STL
-
MDT
1 stop5h 35m
United Airlines
Tue 6/96:30 am
MDT
-
STL
1 stop6h 41m
United Airlines
Deal found 2/28$265
This American Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/86:00 am
STL
-
MDT
1 stop5h 19m
American Airlines
Sat 3/143:34 pm
MDT
-
STL
1 stop4h 56m
American Airlines
Deal found 2/25$269
This American Airlines deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:20 am
STL
-
MDT
1 stop6h 30m
American Airlines
Sat 9/51:55 pm
MDT
-
STL
1 stop6h 28m
American Airlines
Deal found 2/28$280
This United Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/121:13 pm
STL
-
MDT
1 stop7h 16m
United Airlines
Sat 6/206:30 am
MDT
-
STL
1 stop6h 37m
United Airlines
Deal found 2/25$282
This Delta deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/276:00 am
STL
-
MDT
1 stop5h 39m
Delta
Mon 3/306:32 pm
MDT
-
STL
1 stop6h 26m
Delta
Deal found 2/28$294
This American Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/32:00 pm
STL
-
MDT
1 stop4h 10m
American Airlines
Sat 3/77:35 pm
MDT
-
STL
1 stop4h 17m
American Airlines
Deal found 2/25$313

Find flight deals from St. Louis to Harrisburg

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Harrisburg (MDT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$160
(Expedia)

Popular in

August

Cheapest in

April

Average price

$343
Provider with most accurate pricing for Lambert-St Louis-Harrisburg flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Harrisburg flights.
Search Deals
From Lambert-St Louis to Harrisburg
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Harrisburg that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 1, 2026.
Use the filters below to find and compare flights from St. Louis to Harrisburg that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 4/21

9:10 am-4:51 pm

1 stop6h 41m

Harrisburg

Sun 4/26

6:15 am-10:45 am

1 stop5h 30m

$260

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 4/30

6:29 am-2:18 pm

1 stop6h 49m

Harrisburg

Sun 5/3

6:43 pm-11:46 pm

1 stop6h 03m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 6/4

6:45 am-12:12 pm

1 stop4h 27m

Harrisburg

Sat 6/6

5:00 pm-9:09 pm

1 stop5h 09m

$389

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 3/12

9:50 am-3:16 pm

2 stops28h 26m

Harrisburg

Sat 3/21

10:18 pm-7:02 am

1 stop9h 44m

$442

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 8/25

6:00 am-2:09 pm

1 stop7h 09m

Harrisburg

Fri 8/28

2:56 pm-8:50 pm

1 stop6h 54m

$448

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 3/14

6:14 am-11:32 am

1 stop4h 18m

Harrisburg

Sun 3/15

5:00 am-8:35 am

1 stop4h 35m

$466

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 3/13

6:33 pm-11:50 pm

1 stop4h 17m

Harrisburg

Tue 3/31

6:00 am-9:29 am

1 stop4h 29m

$477

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 8/25

8:25 am-1:49 pm

1 stop4h 24m

Harrisburg

Fri 8/28

2:30 pm-3:38 pm

2 stops26h 08m

$517

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 4/22

10:00 am-9:18 pm

1 stop10h 18m

Harrisburg

Sun 4/26

6:15 am-3:48 pm

2 stops10h 33m

$585

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 4/21

5:51 am-2:18 pm

2 stops7h 27m

Harrisburg

Sun 4/26

6:43 pm-11:46 pm

1 stop6h 03m

$626

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/28

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Harrisburg

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Harrisburg in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Harrisburg flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Harrisburg flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Harrisburg flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Harrisburg flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Harrisburg flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Harrisburg

Have a flexible travel schedule? Discover the best time to fly to Harrisburg from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Harrisburg

What is the cheapest month to book a flight from St. Louis to Harrisburg?

Currently, July is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $161). Flying from St. Louis to Harrisburg in January is currently the most expensive (average of $261). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from St. Louis to Harrisburg?

Reviews of airlines servicing Harrisburg

Get insights into the airlines that provide service to Harrisburg. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Harrisburg. Reviews last updated March 1, 2026.
See what other customers who have flown with Delta, United Airlines, and American Airlines from St. Louis to Harrisburg have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,244 reviews

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,244 reviews
Delta
7.9
Good
8,244 reviews

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,370 reviews
Delta
7.9
Good
8,244 reviews

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,370 reviews
Delta
7.9
Good
8,244 reviews

Food

7.2

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Harrisburg. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Harrisburg?

    There are many flights that can get you from St. Louis to Harrisburg in 4h 27m. Fly via United Airlines, American Airlines, or Delta to get the fastest option. The distance between St. Louis and Harrisburg is about 731 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Harrisburg round-trip?

    Flying on American Airlines is currently your cheapest option to Harrisburg, with prices starting at $248. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $248 and $251, respectively. American Airlines is priced at 25% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Harrisburg one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $211. Users have also found prices from $226 and $236 on United Airlines and American Airlines, respectively.

  • Can I find deals for flights from St. Louis to Harrisburg that include hotel bookings?

    Yes. In addition to deals on St. Louis to Harrisburg flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Harrisburg?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Harrisburg.

  • Can I find deals for business class flights from St. Louis to Harrisburg?

    Yes. Cheapflights offers flight deals from St. Louis to Harrisburg by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Harrisburg?

    Currently, July is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $161). Flying from St. Louis to Harrisburg in January is currently the most expensive (average of $261). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Harrisburg?

Book flights to Harrisburg if you plan to visit one of these locations
Hershey
Mechanicsburg
Camp Hill
Carlisle

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from St. Louis to Harrisburg

Discover the top 3 airlines that operate flights from St. Louis to Harrisburg. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$248Average$318FlexibilityNo cancel feeOn-time71%
DeltaCheapest$248Average$318FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$251Average$342FlexibilityNo cancel feeOn-time69%

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