MDT - STL

$212 Find Cheap Flights from Harrisburg to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harrisburg to St. Louis departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harrisburg to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harrisburg to St. Louis, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Harrisburg to St. Louis (MDT-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harrisburg to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Harrisburg to St. Louis

Mon, Sep 29 - Thu, Oct 2
Frontier Logo
10:57 am - 9:06 amMDT-STL
23h 09m2 stops
Frontier Logo
10:49 am - 10:12 amSTL-MDT
22h 23m2 stops
$233Frontier
Find Deal
Wed, Nov 12 - Mon, Nov 17
American Airlines Logo
6:40 am - 10:28 amMDT-STL
4h 48m1 stop
American Airlines Logo
3:23 pm - 11:36 pmSTL-MDT
7h 13m1 stop
$249American Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16
American Airlines Logo
4:25 pm - 11:07 pmMDT-STL
7h 42m1 stop
American Airlines Logo
7:00 am - 2:54 pmSTL-MDT
6h 54m1 stop
$274American Airlines
Find Deal
Thu, Oct 23 - Sun, Oct 26
Delta Logo
6:00 am - 10:26 amMDT-STL
5h 26m1 stop
Delta Logo
6:40 am - 11:53 amSTL-MDT
4h 13m1 stop
$279Delta
Find Deal
Fri, Sep 26 - Mon, Sep 29
American Airlines Logo
6:30 pm - 11:07 pmMDT-STL
5h 37m1 stop
American Airlines Logo
4:55 pm - 10:11 pmSTL-MDT
4h 16m1 stop
$284American Airlines
Find Deal
Fri, Sep 26 - Sun, Sep 28
Frontier Logo
11:07 am - 9:06 amMDT-STL
22h 59m2 stops
Frontier Logo
10:39 am - 10:02 amSTL-MDT
22h 23m2 stops
$295Frontier
Find Deal
Fri, Sep 26 - Sun, Sep 28
United Airlines Logo
6:30 am - 10:49 amMDT-STL
5h 19m1 stop
United Airlines Logo
5:00 am - 10:14 amSTL-MDT
4h 14m1 stop
$309United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
United Airlines Logo
5:48 pm - 10:35 pmMDT-STL
5h 47m1 stop
United Airlines Logo
3:23 pm - 9:25 pmSTL-MDT
5h 02m1 stop
$329United Airlines
Find Deal
Thu, Oct 23 - Sun, Oct 26
Multiple Airlines Logo
8:21 pm - 10:16 amMDT-STL
14h 55m2 stops
Multiple Airlines Logo
1:41 pm - 8:33 amSTL-MDT
17h 52m1 stop
$395Multiple Airlines
Find Deal
Mon, Sep 29 - Thu, Oct 2
Delta Logo
6:23 pm - 11:24 pmMDT-STL
6h 01m1 stop
Delta Logo
5:11 pm - 11:46 pmSTL-MDT
5h 35m1 stop
$569Delta
Find Deal

Everything you should know

Top airlines
Frontier
Cheapest • from $233 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
April
Cheapest • 16% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$233
Typical prices: $279-421
Frontier
Mon 9/29Thu 10/2
MDT - STL • 2 stops
Cheapest one-way
$212
Delta
Tue 11/25
MDT - STL • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Booking Insights

KAYAK's insights & trends for Harrisburg to St. Louis flights

Get data-powered insights and trends into flights from Harrisburg to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Harrisburg to St. Louis?

What’s the cheapest day of the week to fly from Harrisburg to St. Louis?

The average price of all round-trip flights from Harrisburg to St. Louis clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to St. Louis on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Harrisburg to St. Louis. For your return ticket, we recommend flying on a Thursday and avoiding Sundays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harrisburg to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Harrisburg to St. Louis is April, where tickets cost $283 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $384 and $378 respectively.

Good to know

Low seasonJune
Cheapest flight$212
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Harrisburg to St. Louis

When to book flights from Harrisburg to St. Louis

Are your dates flexible? Find out the best times to travel from Harrisburg to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Harrisburg to St. Louis

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

    In the last 3 days, the lowest price for a flight from Harrisburg to St. Louis was $212 for a one-way ticket and $233 for a round-trip.

  • Do I need a passport to fly between Harrisburg and St. Louis?

    A passport is not required to fly from Harrisburg to St. Louis.

  • Which airports will I be using when flying from Harrisburg to St. Louis?

    On your way to St. Louis, you’ll fly out from Harrisburg. You’ll be landing at Lambert-St Louis.

  • Which aircraft models fly most regularly from Harrisburg to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Harrisburg to St. Louis?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Harrisburg and St. Louis, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Harrisburg to St. Louis, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Harrisburg to St. Louis are Delta and United Airlines. With an average price for the route of $323 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $352 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Harrisburg to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Harrisburg to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Harrisburg to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Harrisburg is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Harrisburg to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Harrisburg with another airline. Booking your flights between Harrisburg and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harrisburg to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Harrisburg up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Harrisburg to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Harrisburg to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Harrisburg to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7954 reviews
7.9Entertainment
8.5Crew
8.2Boarding
7.3Food
7.9Comfort
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

We started with trouble checking in 24 hours early. Then my husband did not get his TSA precheck. Finally flight delayed due to no crew. I know things happen

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.