$130 Cheap Flights from Seattle (SEA) to Harrisburg (MDT)

View $130 flight on Mon, Nov 17, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Harrisburg Intl. Airport (MDT)

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Cheap Flights from Seattle to Harrisburg (SEA-MDT)

Prices were available within the past 7 days and start at $130 for one-way flights and $259 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Dec 10 - Sun, Dec 14
SEA
Seattle
MDT
Harrisburg
$259 Roundtrip, found 2 hours ago
$259
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, Dec 10 from Seattle to Harrisburg, returning Sun, Dec 14, priced at $259 found 2 hours ago
United
Wed, Dec 10 - Sun, Dec 14
SEA
Seattle
MDT
Harrisburg
$263 Roundtrip, found 2 hours ago
$263
Roundtrip
found 2 hours ago
Select United flight, departing Wed, Dec 10 from Seattle to Harrisburg, returning Sun, Dec 14, priced at $263 found 2 hours ago
American Airlines
Thu, Nov 6 - Wed, Nov 12
SEA
Seattle
MDT
Harrisburg
$264 Roundtrip, found 3 days ago
$264
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Nov 6 from Seattle to Harrisburg, returning Wed, Nov 12, priced at $264 found 3 days ago
American Airlines
Thu, Nov 6 - Wed, Nov 12
SEA
Seattle
MDT
Harrisburg
$266 Roundtrip, found 3 days ago
$266
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Nov 6 from Seattle to Harrisburg, returning Wed, Nov 12, priced at $266 found 3 days ago
Delta
Fri, Oct 31 - Tue, Nov 11
SEA
Seattle
MDT
Harrisburg
$269 Roundtrip, found 3 days ago
$269
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Oct 31 from Seattle to Harrisburg, returning Tue, Nov 11, priced at $269 found 3 days ago
Delta
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
MDT
Harrisburg
$271 Roundtrip, found 5 days ago
$271
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Nov 4 from Seattle to Harrisburg, returning Mon, Nov 10, priced at $271 found 5 days ago
American Airlines
Mon, Nov 3 - Wed, Nov 12
SEA
Seattle
MDT
Harrisburg
$273 Roundtrip, found 3 days ago
$273
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Nov 3 from Seattle to Harrisburg, returning Wed, Nov 12, priced at $273 found 3 days ago
American Airlines
Wed, Dec 10 - Sun, Dec 14
SEA
Seattle
MDT
Harrisburg
$278 Roundtrip, found 2 hours ago
$278
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, Dec 10 from Seattle to Harrisburg, returning Sun, Dec 14, priced at $278 found 2 hours ago
Delta
Mon, Nov 3 - Wed, Nov 12
SEA
Seattle
MDT
Harrisburg
$279 Roundtrip, found 3 days ago
$279
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Nov 3 from Seattle to Harrisburg, returning Wed, Nov 12, priced at $279 found 3 days ago
Alaska Airlines
Wed, Dec 31 - Tue, Jan 20
SEA
Seattle
MDT
Harrisburg
$359 Roundtrip, found 6 days ago
$359
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Dec 31 from Seattle to Harrisburg, returning Tue, Jan 20, priced at $359 found 6 days ago

Find the cheapest month to fly from Seattle (SEA) to Harrisburg (MDT)

August is typically the cheapest month to fly

From $256 - $718 per traveler.

Alternative airports near Harrisburg

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

Select flight to Harrisburg Intl. MDT. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $389
MDT
Harrisburg Intl.
Cheapest
Average driving time to city center16 min
Flights from $389

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT) cost?
Secure a cheap one-way flight from $130 or cheap return flight from $259 from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT)?
Flying in December may help you find better deals, as it's the cheapest month for flights between SEA and MDT. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SEA to MDT flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT)?
Direct flights from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to MDT?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the season, airline 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 Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT) route, aim to travel before 3 PM. Later departures are 22% more likely to be 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 Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT) last-minute?
Last-minute fares from SEA to MDT are generally more expensive. To secure the lowest rates, start looking for flights as soon as possible. That being said, if you can play around with your travel dates, you may find a cheap fare just before your departure.
Is it cheaper to book a SEA to MDT flight and hotel package?
You can save money by booking a SEA to MDT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've chosen your ideal flights and accommodations, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT)?
Generally, it's possible to cancel or reschedule your SEA to MDT flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Harrisburg Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$258
Distance
2290 mi

Book with confidence

Seattle to Harrisburg Flights

The cheapest times to fly from Seattle to Harrisburg

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 Seattle to Harrisburg are during the month of December. You can find some of the cheapest flights from Seattle to Harrisburg with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Harrisburg

Sunday is one of the best days to book for cheap flights from Seattle to Harrisburg: 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 Seattle to Harrisburg

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 Seattle to Harrisburg in 2025. You can also book with separate airlines for your outbound and return journeys, from $130 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 Seattle to Harrisburg 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 Seattle to Harrisburg 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.

 

Seattle to Harrisburg Flights

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*Available to One Key members.