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Cheap flights from Harrisburg to St. Louis from $152

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 4/23. 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
0 bags

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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
3:37 pm - 7:30 pm
MDT
-
STL
4h 53m
1 stop
American Airlines Logo
6:53 pm - 12:31 am
STL
-
MDT
4h 38m
1 stop
$291American Airlines
mié., abr. 22 - sáb., abr. 25
Delta Logo
12:25 pm - 3:58 pm
MDT
-
STL
4h 33m
1 stop
Delta Logo
6:45 am - 11:51 am
STL
-
MDT
4h 06m
1 stop
$300Delta
mié., jul. 1 - dom., jul. 5
American Airlines Logo
6:31 pm - 11:44 pm
MDT
-
STL
6h 13m
1 stop
American Airlines Logo
6:14 am - 11:32 am
STL
-
MDT
4h 18m
1 stop
$309American Airlines
mar., mar. 31 - sáb., abr. 4
Delta Logo
4:19 pm - 8:44 pm
MDT
-
STL
5h 25m
1 stop
Delta Logo
5:59 pm - 11:03 pm
STL
-
MDT
4h 04m
1 stop
$311Delta
mar., abr. 21 - sáb., abr. 25
Delta Logo
6:00 am - 9:48 am
MDT
-
STL
4h 48m
1 stop
Delta Logo
5:30 pm - 11:41 pm
STL
-
MDT
5h 11m
1 stop
$320Delta
sáb., abr. 25 - lun., jun. 8
Delta Logo
12:25 pm - 3:58 pm
MDT
-
STL
4h 33m
1 stop
Delta Logo
6:00 am - 2:09 pm
STL
-
MDT
7h 09m
1 stop
$329Delta
jue., jul. 30 - dom., ago. 2
Delta Logo
6:00 am - 9:42 am
MDT
-
STL
4h 42m
1 stop
Delta Logo
5:59 pm - 11:03 pm
STL
-
MDT
4h 04m
1 stop
$345Delta
jue., abr. 23 - sáb., abr. 25
United Airlines Logo
5:52 pm - 9:13 pm
MDT
-
STL
4h 21m
1 stop
United Airlines Logo
7:45 am - 1:30 pm
STL
-
MDT
4h 45m
1 stop
$350United Airlines
jue., abr. 2 - dom., abr. 5
Delta Logo
6:25 pm - 11:37 pm
MDT
-
STL
6h 12m
1 stop
Delta Logo
6:00 am - 2:09 pm
STL
-
MDT
7h 09m
1 stop
$354Delta
vie., sep. 11 - dom., sep. 13
United Airlines Logo
8:29 am - 12:22 pm
MDT
-
STL
4h 53m
1 stop
United Airlines Logo
6:30 am - 1:33 pm
STL
-
MDT
6h 03m
1 stop
$370United Airlines
vie., abr. 24 - mar., abr. 28

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 marzo 17, 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

mié. 4/22

3:37 pm-7:30 pm

1 stop4h 53m

Lambert-St Louis

sáb. 4/25

6:53 pm-12:31 am

1 stop4h 38m

$291
Quickest round-trip

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

mié. 7/1

12:25 pm-3:58 pm

1 stop4h 33m

Lambert-St Louis

dom. 7/5

6:45 am-11:51 am

1 stop4h 06m

$300

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

mar. 3/31

6:31 pm-11:44 pm

1 stop6h 13m

Lambert-St Louis

sáb. 4/4

6:14 am-11:32 am

1 stop4h 18m

$309

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

mar. 4/21

4:19 pm-8:44 pm

1 stop5h 25m

Lambert-St Louis

sáb. 4/25

5:59 pm-11:03 pm

1 stop4h 04m

$311

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

sáb. 4/25

6:00 am-9:48 am

1 stop4h 48m

Lambert-St Louis

lun. 6/8

5:30 pm-11:41 pm

1 stop5h 11m

$320

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

jue. 7/30

12:25 pm-3:58 pm

1 stop4h 33m

Lambert-St Louis

dom. 8/2

6:00 am-2:09 pm

1 stop7h 09m

$329

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

jue. 4/23

6:00 am-9:42 am

1 stop4h 42m

Lambert-St Louis

sáb. 4/25

5:59 pm-11:03 pm

1 stop4h 04m

$345

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

jue. 4/2

5:52 pm-9:13 pm

1 stop4h 21m

Lambert-St Louis

dom. 4/5

7:45 am-1:30 pm

1 stop4h 45m

$350

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

vie. 9/11

6:25 pm-11:37 pm

1 stop6h 12m

Lambert-St Louis

dom. 9/13

6:00 am-2:09 pm

1 stop7h 09m

$354

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

vie. 4/24

8:29 am-12:22 pm

1 stop4h 53m

Lambert-St Louis

mar. 4/28

6:30 am-1:33 pm

1 stop6h 03m

$370

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 cheapest month to fly to St. Louis?

In general, May 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 $298. The month of January is another great option to travel to St. Louis, with average flight prices from Harrisburg averaging around $304.

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

  • 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
9,431 reviews
Search United Airlines flights
American AirlinesPriceFrom $248Free CancellationRating
7.1
11,468 reviews
Search American Airlines flights
DeltaPriceFrom $248Free CancellationRating
7.9
8,288 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
Alton
St. Peters
Wentzville
Fenton
Farmington
Clayton
Edwardsville
Festus
Eureka
Litchfield
Shrewsbury
Grafton

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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