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Cheap flights from Harrisburg to St. Louis from $269

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Harrisburg to St. Louis departing on 8/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Harrisburg to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:34 pm - 11:34 pm
MDT
-
STL
5h 00m
1 stop
American Airlines Logo
5:05 pm - 11:59 pm
STL
-
MDT
5h 54m
1 stop
$291American Airlines
Wed, Aug 5 - Sat, Aug 15
Delta Logo
6:22 pm - 11:53 pm
MDT
-
STL
6h 31m
1 stop
Delta Logo
9:24 am - 5:37 pm
STL
-
MDT
7h 13m
1 stop
$300Delta
Fri, Jul 10 - Wed, Jul 15
Delta Logo
6:22 pm - 11:53 pm
MDT
-
STL
6h 31m
1 stop
Delta Logo
9:24 am - 5:37 pm
STL
-
MDT
7h 13m
1 stop
$309Delta
Fri, Jul 10 - Wed, Jul 15
Delta Logo
6:22 pm - 10:18 pm
MDT
-
STL
4h 56m
1 stop
Delta Logo
3:58 pm - 11:53 pm
STL
-
MDT
6h 55m
1 stop
$315Delta
Fri, Jul 3 - Tue, Jul 7
Delta Logo
6:22 pm - 11:53 pm
MDT
-
STL
6h 31m
1 stop
Delta Logo
6:00 am - 2:10 pm
STL
-
MDT
7h 10m
1 stop
$325Delta
Fri, Jul 17 - Tue, Jul 21
Delta Logo
6:00 am - 9:34 am
MDT
-
STL
4h 34m
1 stop
Delta Logo
6:00 am - 2:09 pm
STL
-
MDT
7h 09m
1 stop
$334Delta
Thu, Sep 10 - Sun, Sep 13
Multiple Airlines Logo
11:44 am - 4:31 pm
MDT
-
STL
29h 47m
2 stops
Multiple Airlines Logo
8:34 pm - 10:13 am
STL
-
MDT
12h 39m
1 stop
$340Multiple Airlines
Mon, Aug 31 - Sun, Sep 13
American Airlines Logo
7:45 pm - 12:16 am
MDT
-
STL
5h 31m
1 stop
American Airlines Logo
6:14 am - 1:55 pm
STL
-
MDT
6h 41m
1 stop
$360American Airlines
Fri, Jul 3 - Sun, Jul 5
Multiple Airlines Logo
11:44 am - 4:31 pm
MDT
-
STL
29h 47m
2 stops
Multiple Airlines Logo
8:34 pm - 8:18 am
STL
-
MDT
10h 44m
1 stop
$364Multiple Airlines
Mon, Aug 31 - Thu, Sep 10
Delta Logo
2:00 pm - 6:07 pm
MDT
-
STL
5h 07m
1 stop
Delta Logo
6:00 am - 11:11 am
STL
-
MDT
4h 11m
1 stop
$365Delta
Wed, Jul 1 - Sun, Jul 5

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Delta flights from Harrisburg to St. Louis

Our best Delta deals on Harrisburg to St. Louis flight tickets
Delta
Jul 10
MDT6:22 pmHarrisburg
6h 31m
1 stop
STL11:53 pmLambert-St Louis
Jul 15
STL9:24 amLambert-St Louis
7h 13m
1 stop
MDT5:37 pmHarrisburg
$300
Delta
Jul 10
MDT6:22 pmHarrisburg
6h 31m
1 stop
STL11:53 pmLambert-St Louis
Jul 15
STL9:24 amLambert-St Louis
7h 13m
1 stop
MDT5:37 pmHarrisburg
$309
Delta
Jul 3
MDT6:22 pmHarrisburg
4h 56m
1 stop
STL10:18 pmLambert-St Louis
Jul 7
STL3:58 pmLambert-St Louis
6h 55m
1 stop
MDT11:53 pmHarrisburg
$315

American Airlines flights from Harrisburg to St. Louis

Our best American Airlines deals on Harrisburg to St. Louis flight tickets
American Airlines
Aug 5
MDT7:34 pmHarrisburg
5h 00m
1 stop
STL11:34 pmLambert-St Louis
Aug 15
STL5:05 pmLambert-St Louis
5h 54m
1 stop
MDT11:59 pmHarrisburg
$291
American Airlines
Jul 3
MDT7:45 pmHarrisburg
5h 31m
1 stop
STL12:16 amLambert-St Louis
Jul 5
STL6:14 amLambert-St Louis
6h 41m
1 stop
MDT1:55 pmHarrisburg
$360
American Airlines
Jul 30
MDT7:38 pmHarrisburg
4h 54m
1 stop
STL11:32 pmLambert-St Louis
Aug 2
STL6:14 amLambert-St Louis
6h 41m
1 stop
MDT1:55 pmHarrisburg
$369

momondo Fare Finder

 
Customize your flight search to find flights from Harrisburg to St. Louis 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, momondo users made 832,500 searches. Data last updated June 20, 2026.
Use the filters below to find and compare flights from Harrisburg to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Wed 8/5

7:34 pm-11:34 pm

1 stop5h 00m

Lambert-St Louis

Sat 8/15

5:05 pm-11:59 pm

1 stop5h 54m

$291

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 7/10

6:22 pm-11:53 pm

1 stop6h 31m

Lambert-St Louis

Wed 7/15

9:24 am-5:37 pm

1 stop7h 13m

$300

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 7/10

6:22 pm-11:53 pm

1 stop6h 31m

Lambert-St Louis

Wed 7/15

9:24 am-5:37 pm

1 stop7h 13m

$309

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 7/3

6:22 pm-10:18 pm

1 stop4h 56m

Lambert-St Louis

Tue 7/7

3:58 pm-11:53 pm

1 stop6h 55m

$315

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 7/17

6:22 pm-11:53 pm

1 stop6h 31m

Lambert-St Louis

Tue 7/21

6:00 am-2:10 pm

1 stop7h 10m

$325

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Thu 9/10

6:00 am-9:34 am

1 stop4h 34m

Lambert-St Louis

Sun 9/13

6:00 am-2:09 pm

1 stop7h 09m

$334

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Mon 8/31

11:44 am-4:31 pm

2 stops29h 47m

Lambert-St Louis

Sun 9/13

8:34 pm-10:13 am

1 stop12h 39m

$340

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 7/3

7:45 pm-12:16 am

1 stop5h 31m

Lambert-St Louis

Sun 7/5

6:14 am-1:55 pm

1 stop6h 41m

$360

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Mon 8/31

11:44 am-4:31 pm

2 stops29h 47m

Lambert-St Louis

Thu 9/10

8:34 pm-8:18 am

1 stop10h 44m

$364
Quickest round-trip

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Wed 7/1

2:00 pm-6:07 pm

1 stop5h 07m

Lambert-St Louis

Sun 7/5

6:00 am-11:11 am

1 stop4h 11m

$365

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to St. Louis from

How to get the cheapest flight ticket from Harrisburg to St. Louis

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

What is the typical price of a round-trip flight between Harrisburg and St. Louis?

What is the cheapest month to fly to St. Louis?

In general, January is the cheapest month to fly from Harrisburg to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $304. The month of October is another great option to travel to St. Louis, with average flight prices from Harrisburg averaging around $308.

How have Harrisburg to St. Louis flight prices changed over time?

When to book flights from Harrisburg to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Harrisburg to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Harrisburg to St. Louis (MDT to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harrisburg to St. Louis

Fastest flight time

4h 20m

Direct flights

None
The fastest flight from Harrisburg to St. Louis takes 4h 20m
There are no direct flights from Harrisburg to St. Louis. There are no popular flight routes from Harrisburg to St. Louis.
Search flight deals

Frequently asked questions about flying from Harrisburg to St. Louis

  • How far is Harrisburg to Lambert-St Louis by plane?

    There are 718.1 mi between Harrisburg and Lambert-St Louis. Typically, this will take 4h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from Harrisburg Airport to Lambert-St Louis Airport?

    Prices for flights from Harrisburg Airport to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Harrisburg Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Harrisburg Airport to Lambert-St Louis Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harrisburg Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Harrisburg to St. Louis?

Best airlines flying from Harrisburg to St. Louis

Compare and see reviews for airlines that fly from Harrisburg to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $248Free CancellationRating
7.4
9,865 reviews
Search United Airlines flights
American AirlinesPriceFrom $248Free CancellationRating
7.1
11,715 reviews
Search American Airlines flights
DeltaPriceFrom $251Free CancellationRating
7.8
8,420 reviews
Search Delta flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Clayton
Fenton
Farmington
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

Why use momondo?

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

Finding the right flight to St. Louis from Harrisburg is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights from Harrisburg to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Harrisburg to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Harrisburg to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Harrisburg to St. Louis.

I’m not ready to book a flight from Harrisburg to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Harrisburg are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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