Cheap Flights from Harrisburg (HAR) to St. Louis (STL)

Popular airlines from Harrisburg, PA (HAR-Capital City) to St. Louis Lambert Intl. Airport (STL)

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $254
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $254

Frequently asked questions

How much does a flight from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL) cost?
Lock in a cheap one-way flight or cheap return flight from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL)?
Traveling in may help you find better deals, as it's the cheapest month for flights between HAR and STL. You'll often find the lowest prices during off-peak months.
What is the cheapest airline that flies from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from HAR to STL. Then, sort your results by "Price (lowest to highest)" to score the best deal available.
How many flights per day from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from HAR to STL?
Typically you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can vary based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from HAR to STL just before your journey is generally more expensive. However, if there's some wiggle room with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a HAR to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a HAR to STL flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the stress out of planning your trip. Just secure your flights and select from our wide range of hotels, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Harrisburg, PA (HAR-Capital City) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you're able to reschedule or cancel your HAR to STL flight. However, there may be additional fees, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you'd like further details, head to our Customer Service portal.

Travel information

Origin airport
Capital City
Destination airport
Lambert-St. Louis Intl.
Distance
727 mi

Book with confidence

Harrisburg to St. Louis Flights

The cheapest times to fly from Harrisburg to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Harrisburg to St. Louis are during the month of . You can find some of the cheapest flights from Harrisburg to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Harrisburg to St. Louis

Sunday is one of the best days to book for cheap flights from Harrisburg to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Harrisburg to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Harrisburg to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Harrisburg to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Harrisburg to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Harrisburg to St. Louis Flights

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*Available to One Key members.