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. Fly via United 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 Delta is currently your cheapest option to Harrisburg, with prices starting at $172. 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 51% 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 United Airlines. According to our data, you can fly for as low as $226. Users have also found prices from $236 and $250 on American Airlines and Delta, respectively.

In terms of precipitation, rainfall in Harrisburg ranges from 2.7 - 4.1 inches per month. May is typically the wettest month, when rainfall can reach 4.1 in. February is typically the driest time to visit Harrisburg when rainfall is around 2.7 in.

If weather is an important factor for your trip to Harrisburg, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

What are the most popular airlines that fly from St. Louis to Harrisburg?

The most popular airlines flying from St. Louis to Harrisburg are American Airlines, Delta and United Airlines. Something to consider prior to booking your flight.

What is the cheapest time of day to fly from STL to MDT?

When flying from St. Louis to Harrisburg, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on St. Louis-Harrisburg flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Harrisburg flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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.

$249+ Flights from St. Louis to Harrisburg

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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 December 28, 2025.

Sun 12/285:40 amSTL - MDT

1 stop4h 37mAmerican Airlines

Sun 1/115:47 amMDT - STL

1 stop4h 53mAmerican Airlines

Deal found 12/26

$319

Sun 12/2811:51 amSTL - MDT

2 stops20h 07mMultiple Airlines

Sun 1/115:51 pmMDT - STL

1 stop15h 14mMultiple Airlines

Deal found 12/26

$755

Best flights from St. Louis to Harrisburg
Discover carefully curated flight deals from St. Louis to Harrisburg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

Fri 1/163:11 pmSTL - MDT

1 stop4h 54mUnited Airlines

Sat 1/175:26 pmMDT - STL

1 stop4h 47mUnited Airlines

Deal found 12/26

$269

Fri 1/165:56 pmSTL - MDT

1 stop4h 00mDelta

Sun 1/186:10 amMDT - STL

1 stop4h 29mDelta

Deal found 12/26

$269

Mon 3/23:49 pmSTL - MDT

1 stop17h 43mFrontier

Thu 3/2610:13 pmMDT - STL

1 stop9h 54mFrontier

Deal found 12/28

$360

Fri 1/168:32 pmSTL - MDT

2 stops16h 04mMultiple Airlines

Sun 1/185:51 pmMDT - STL

1 stop15h 03mMultiple Airlines

Deal found 12/26

$412

Fri 1/165:56 pmSTL - MDT

1 stop4h 00mDelta

Sat 1/171:45 pmMDT - STL

1 stop6h 42mDelta

Deal found 12/26

$269

Sat 1/101:15 pmSTL - MDT

1 stop6h 50mUnited Airlines

Wed 1/146:15 amMDT - STL

1 stop4h 58mUnited Airlines

Deal found 12/26

$339

Thu 1/88:30 amSTL - MDT

1 stop4h 21mUnited Airlines

Mon 1/125:30 pmMDT - STL

1 stop6h 28mUnited Airlines

Deal found 12/26

$339

Sat 2/219:55 amSTL - MDT

2 stops22h 42mUnited Airlines

Tue 2/245:40 pmMDT - STL

1 stop4h 25mUnited Airlines

Deal found 12/25

$432

Mon 1/128:05 amSTL - MDT

1 stop7h 29mUnited Airlines

Fri 1/1610:34 amMDT - STL

1 stop24h 39mUnited Airlines

Deal found 12/27

$486

Last-minute flights from St. Louis to Harrisburg
Discover last-minute flight deals from St. Louis to Harrisburg. Data last updated December 28, 2025 and is based on user searches.

Sun 12/285:40 amSTL - MDT

1 stop4h 37mAmerican Airlines

Sun 1/115:47 amMDT - STL

1 stop4h 53mAmerican Airlines

Deal found 12/26

$319

Sun 12/2811:51 amSTL - MDT

2 stops20h 07mMultiple Airlines

Sun 1/115:51 pmMDT - STL

1 stop15h 14mMultiple Airlines

Deal found 12/26

$755

Thu 1/88:30 amSTL - MDT

1 stop4h 21mUnited Airlines

Mon 1/125:30 pmMDT - STL

1 stop6h 28mUnited Airlines

Deal found 12/26

$339

Sun 1/116:00 amSTL - MDT

1 stop4h 37mDelta

Thu 1/155:05 pmMDT - STL

1 stop4h 38mDelta

Deal found 12/27

$589

Sun 1/116:30 amSTL - MDT

2 stops6h 21mUnited Airlines

Thu 1/1510:48 amMDT - STL

1 stop6h 15mUnited Airlines

Deal found 12/27

$831

Mon 1/128:05 amSTL - MDT

1 stop7h 29mUnited Airlines

Fri 1/1610:34 amMDT - STL

1 stop24h 39mUnited Airlines

Deal found 12/27

$486

Fri 1/165:56 pmSTL - MDT

1 stop4h 00mDelta

Sun 1/186:10 amMDT - STL

1 stop4h 29mDelta

Deal found 12/26

$269

Fri 1/168:32 pmSTL - MDT

2 stops16h 04mMultiple Airlines

Sun 1/185:51 pmMDT - STL

1 stop15h 03mMultiple Airlines

Deal found 12/26

$412

Fri 1/163:11 pmSTL - MDT

1 stop4h 54mUnited Airlines

Sat 1/176:15 amMDT - STL

2 stops12h 28mUnited Airlines

Deal found 12/26

$424

Fri 1/169:57 amSTL - MDT

2 stops8h 02mUnited Airlines

Sun 1/186:15 amMDT - STL

2 stops7h 14mUnited Airlines

Deal found 12/26

$826

One-way flights from St. Louis to Harrisburg
Search for one-way flight options from St. Louis to Harrisburg. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

Sun 1/185:00 pmSTL - MDT

1 stop5h 26mDelta

Deal found 12/27

$249

Sun 1/183:11 pmSTL - MDT

2 stops17h 24mUnited Airlines

Deal found 12/25

$318

Find flight deals from St. Louis to Harrisburg

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$204 (Frontier)
Popular in	April
Cheapest in	July
Average price	$362

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

Highest demand for flights based on searches. 13% potential increase in price ($54 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Fri 1/16

3:11 pm-9:05 pm

1 stop4h 54m

Harrisburg

Sat 1/17

5:26 pm-9:13 pm

1 stop4h 47m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 1/16

5:56 pm-10:56 pm

1 stop4h 00m

Harrisburg

Sun 1/18

6:10 am-9:39 am

1 stop4h 29m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 1/16

5:56 pm-10:56 pm

1 stop4h 00m

Harrisburg

Sat 1/17

1:45 pm-7:27 pm

1 stop6h 42m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 1/10

1:15 pm-9:05 pm

1 stop6h 50m

Harrisburg

Wed 1/14

6:15 am-10:13 am

1 stop4h 58m

$339

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 1/8

8:30 am-1:51 pm

1 stop4h 21m

Harrisburg

Mon 1/12

5:30 pm-10:58 pm

1 stop6h 28m

$339

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 3/2

3:49 pm-10:32 am

1 stop17h 43m

Harrisburg

Thu 3/26

10:13 pm-7:07 am

1 stop9h 54m

$360

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 1/16

8:32 pm-1:36 pm

2 stops16h 04m

Harrisburg

Sun 1/18

5:51 pm-7:54 am

1 stop15h 03m

$412

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 2/21

9:55 am-9:37 am

2 stops22h 42m

Harrisburg

Tue 2/24

5:40 pm-9:05 pm

1 stop4h 25m

$432

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 1/12

8:05 am-4:34 pm

1 stop7h 29m

Harrisburg

Fri 1/16

10:34 am-10:13 am

1 stop24h 39m

$486

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 1/18

5:00 pm-11:26 pm

1 stop5h 26m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 12 results

Compare providers for flights from St. Louis to Harrisburg

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Harrisburg flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, January is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $124). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $248). 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.

Reviews of airlines servicing Harrisburg

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

8,019 reviews

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

8,019 reviews

Delta

7.9

Good

8,019 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

United Airlines

7.4

Good

9,113 reviews

Delta

7.9

Good

8,019 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

American Airlines

7.2

Good

11,072 reviews

Delta

7.9

Good

8,019 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

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. Fly via United 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 Delta is currently your cheapest option to Harrisburg, with prices starting at $172. 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 51% 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 United Airlines. According to our data, you can fly for as low as $226. Users have also found prices from $236 and $250 on American Airlines and Delta, 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, January is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $124). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $248). 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

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Top 3 airlines flying from St. Louis to Harrisburg

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$172	Average$318	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$248	Average$349	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$248	Average$326	FlexibilityNo cancel fee	On-time71%

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$249+ 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from St. Louis to Harrisburg

Cheapest flights from St. Louis to HarrisburgExplore 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 December 28, 2025.

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 December 28, 2025.

Find flight deals from St. Louis to Harrisburg

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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 December.

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.

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?

Reviews of airlines servicing Harrisburg

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.

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?

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

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

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

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

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

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

Traveling to a place near Harrisburg?

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Top 3 airlines flying from St. Louis to Harrisburg

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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 December 28, 2025.