Cheap flights from Harrisburg to St. Louis from $207
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 10/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Harrisburg to St. Louis
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
American Airlines flights from Harrisburg to St. Louis
Our best American Airlines deals on Harrisburg to St. Louis flight tickets
Delta flights from Harrisburg to St. Louis
Our best Delta deals on Harrisburg to St. Louis flight tickets
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, October 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 $285. The month of September is another great option to travel to St. Louis, with average flight prices from Harrisburg averaging around $291.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $318. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $762. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Harrisburg at noon is the least expensive time of day to depart. momondo users have found prices as low as $325 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $389 per ticket.
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Harrisburg when booking 22 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $338 when searching 22 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Harrisburg for as low as $252 on momondo.
What is the cheapest airline that flies from Harrisburg to Lambert-St Louis?
American Airlines and Delta are the most popular carriers operating from Harrisburg to Lambert-St Louis
What airlines fly to St. Louis?
American Airlines, Southwest and Delta are the top three most popular airlines that fly to St. Louis from Harrisburg according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
When to book flights from Harrisburg to St. Louis
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
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 30m 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?
The number of operators available for flights from Harrisburg Airport to Lambert-St Louis Airport is 3 as of April 2025.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Harrisburg to St. Louis is American Airlines (65% of total bookings). The next most popular airlines are Delta (19%) and United Airlines (16%).
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 | ||
|---|---|---|---|---|---|
| PriceFrom $248 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $248 | Free Cancellation | Rating 7.4 8,667 reviews | |||
| PriceFrom $248 | Free Cancellation | Rating 8.0 7,917 reviews |
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy 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.