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Harrisburg

$143+ Cheap flights from St. Louis to Harrisburg (STL - MDT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap 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 August 14, 2025.

Round-trip from

$249
(American Airlines)

One-way from

$143
(FlightHub)

Popular in

April

Cheapest in

September

Average price

$402
From Lambert-St Louis to Harrisburg
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One-way flight from Lambert-St Louis to Harrisburg
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Highest demand for flights based on searches. 13% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 14, 2025.

This American Airlines deal was found by Cheapflights users on 8/12. 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.
Sat 9/276:00 amSTL - MDT
1 stop4h 55mAmerican Airlines
Tue 9/306:00 amMDT - STL
1 stop4h 26mAmerican Airlines
Deal found 8/12$249
This Delta deal was found by Cheapflights users on 8/12. 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.
Tue 9/3011:04 amSTL - MDT
2 stops10h 57mDelta
Tue 10/76:00 amMDT - STL
1 stop7h 35mDelta
Deal found 8/12$254
This Delta deal was found by Cheapflights users on 8/13. 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.
Mon 10/65:15 pmSTL - MDT
1 stop4h 53mDelta
Thu 10/166:00 amMDT - STL
1 stop5h 26mDelta
Deal found 8/13$279
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Sat 8/165:22 amSTL - MDT
1 stop5h 08mAmerican Airlines
Mon 8/186:10 pmMDT - STL
1 stop5h 55mAmerican Airlines
Deal found 8/12$328
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/123:20 pmSTL - MDT
1 stop4h 55mUnited Airlines
Sun 9/148:15 amMDT - STL
1 stop5h 10mUnited Airlines
Deal found 8/12$368
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 8/131:20 pmSTL - MDT
1 stop6h 51mUnited Airlines
Wed 8/206:30 amMDT - STL
1 stop6h 55mUnited Airlines
Deal found 8/13$383
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 12/125:58 amSTL - MDT
1 stop10h 43mAmerican Airlines
Sun 12/146:35 amMDT - STL
1 stop6h 25mAmerican Airlines
Deal found 8/12$390
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sun 9/285:00 amSTL - MDT
1 stop4h 14mUnited Airlines
Sun 10/56:30 amMDT - STL
1 stop5h 19mUnited Airlines
Deal found 8/14$409
This United Airlines deal was found by Cheapflights users on 8/12. 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 12/126:42 pmSTL - MDT
2 stops18h 10mUnited Airlines
Sun 12/148:20 amMDT - STL
1 stop7h 05mUnited Airlines
Deal found 8/12$435
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/273:23 pmSTL - MDT
1 stop5h 02mUnited Airlines
Tue 9/306:15 amMDT - STL
2 stops10h 29mUnited Airlines
Deal found 8/12$437

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 August 14, 2025.
Use the filters below to find and compare flights from St. Louis to Harrisburg that are best for you.

Fly from

St. Louis

Fly to

Harrisburg

Route

Depart

Return

Price

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 9/27

6:00 am-11:55 am

1 stop4h 55m

Harrisburg

Tue 9/30

6:00 am-9:26 am

1 stop4h 26m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 9/30

8:17 am-2:21 pm

1 stop5h 04m

Harrisburg

Tue 10/7

6:00 am-9:37 am

1 stop4h 37m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 9/30

11:04 am-11:01 pm

2 stops10h 57m

Harrisburg

Tue 10/7

6:00 am-12:35 pm

1 stop7h 35m

$254

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 10/6

5:15 pm-11:08 pm

1 stop4h 53m

Harrisburg

Thu 10/16

6:00 am-10:26 am

1 stop5h 26m

$279

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 9/12

3:20 pm-9:15 pm

1 stop4h 55m

Harrisburg

Sun 9/14

8:15 am-12:25 pm

1 stop5h 10m

$368

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/12

5:58 am-5:41 pm

1 stop10h 43m

Harrisburg

Sun 12/14

6:35 am-12:00 pm

1 stop6h 25m

$390

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 9/28

5:00 am-10:14 am

1 stop4h 14m

Harrisburg

Sun 10/5

6:30 am-10:49 am

1 stop5h 19m

$409

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/12

6:42 pm-1:52 pm

2 stops18h 10m

Harrisburg

Sun 12/14

8:20 am-2:25 pm

1 stop7h 05m

$435

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 9/21

1:52 pm-10:02 am

1 stop19h 10m

$143

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 9/2

7:54 pm-11:27 am

2 stops38h 33m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 13 results
1
2

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, January is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $355). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $408). 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 August 14, 2025.
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
8.0
Very good
7,980 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Flying on Delta is currently your cheapest option to Harrisburg, with prices starting at $211. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $248 and $248, respectively. Delta is priced at 39% lower than the current average price of a flight leaving 3 months from now.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $355). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $408). 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
Carlisle
Hershey
Mechanicsburg
Camp Hill

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Alternative routes for St. Louis to Harrisburg

See prices for flight routes from nearby airports that may be better suited for you.
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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$211Average$352FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$343FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$356FlexibilityNo cancel feeOn-time71%

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