Cheap flights from Seattle / Tacoma International to Harrisburg International

Compare Seattle / Tacoma International to Harrisburg International flight deals

Find the cheapest month or even day of the year to fly to Harrisburg International

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Flight deals from Seattle / Tacoma International to Harrisburg International

Looking for a cheap last-minute deal or the best round-trip flight from Seattle / Tacoma International to Harrisburg International? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Seattle / Tacoma International to Harrisburg International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Harrisburg International flights are currently cheapest in March.

Seattle / Tacoma International to Harrisburg International: Alternative routes

Compare routes from Seattle / Tacoma International to Harrisburg below. You may find an airport to fly into that's cheaper, faster, or easier than Harrisburg International.

Seattle to Harrisburg: Flight information

The things to know before you go.
Cheapest flight found$276
Cheapest month to flyMarch

Finding cheap flights from Seattle / Tacoma International to Harrisburg International: Frequently asked questions

The best price we found for a round-trip flight from Seattle / Tacoma International to Harrisburg International is $276. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle / Tacoma International to Harrisburg International. But we found flights with one or more stops from $276.
There are no flights flying from Seattle / Tacoma International to Harrisburg International, as of March 2026.
The cheapest month to fly from Seattle / Tacoma International to Harrisburg International is usually March.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Harrisburg International Airport on Tuesday, March 17, 2026.
No airlines currently offer direct flights between Seattle / Tacoma International Airport and Harrisburg International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Harrisburg International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Harrisburg is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, United offers the cheapest flight tickets to Harrisburg International.

Flying from Seattle-Tacoma International Airport (SEA) to Harrisburg International Airport (MDT): what you need to know

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Make sure you're at the airport on time to catch your SEA to MDT flight.

  • Flying during a peak time like July? Major public holidays and other popular periods can result in longer lines at check-in and security. Be extra cautious and arrive up to four hours ahead of an international flight and two hours before a domestic departure.

  • If you'd like to split up your journey, just uncheck 'Direct flights only' when searching for your ticket from Seattle-Tacoma International Airport to Harrisburg International Airport. Here are the top stopovers between SEA and MDT:

    • O'Hare International Airport

    • Washington Dulles International Airport

    • Detroit Metropolitan Wayne County Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Harrisburg International Airport (MDT)

  • The cheapest price we've seen for a one-way Seattle-Tacoma International Airport to Harrisburg International Airport flight is $129. A return fare is currently $276. Depending on the availability when you book, these fares could change.

  • It's usually best to book as early as possible if you want to find cheap tickets from SEA to MDT. That's because airlines adjust prices based on demand, which tends to increase closer to departure.

  • If you're willing to be flexible with your travel plans, use the 'Whole month' search function. It'll find the cheapest price across every month when looking for your flight from Seattle-Tacoma International Airport to Harrisburg International Airport.

  • There's no need to check back in every day to find out if fares have gone down when you set up a Price Alert. We'll update you the moment a special offer becomes available on cheap flights from SEA to MDT.

  • Discover the right flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Seattle-Tacoma International Airport to Harrisburg International Airport, use the 'Sort by' tool. You can also filter by arrival and departure times, airline, and journey duration.

Handy information about Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport gets top marks for on-time performance. 81.27% of flights that depart SEA arrive at their destination as scheduled.

  • To get to Seattle-Tacoma International Airport from central Seattle, it'll take about 20 minutes if you're traveling by car. Of course, this depends on traffic. It's approximately 23 kilometers from the airport to the city center.

  • You can expect a journey time of roughly 55 minutes on public transport.

  • Catching an early flight from Seattle-Tacoma International Airport to Harrisburg International Airport? Avoid the stress of rushing to the terminal (and catch some extra z's) by picking one of these stays close to SEA:

Arriving at Harrisburg International Airport (MDT)

Getting from Harrisburg International Airport (MDT) to central Harrisburg

  • You'll find MDT at One Terminal Drive.

  • From Harrisburg International Airport, Harrisburg is approximately 19 kilometers away. It takes around 20 minutes to reach the center driving.

  • It typically takes 40 minutes to get there by public transport.

When to fly to Harrisburg International Airport (MDT)

  • July is the most popular month for flights from Seattle-Tacoma International Airport to Harrisburg International Airport. To steer clear of the crowds, travel to Harrisburg in February.

  • Before locking in your flight from Seattle-Tacoma International Airport to Harrisburg International Airport, consider the type of weather you like. July is the warmest month in Harrisburg, with temperatures ranging from 16ºC (61ºF) to 31ºC (88ºF).

  • If you want to travel in cooler conditions, look for a cheap ticket from SEA to MDT in January. Temperatures average between -9ºC (16ºF) and 7ºC (45ºF) then.

Explore more of United States

  • New York is just one of the many cities in United States waiting to be discovered once you've seen Harrisburg. Around 241 kilometers away to the east, its best attractions include Statue of Liberty, Central Park and Empire State Building.

  • Philadelphia is another favorite destination in United States and is around 153 kilometers east of Harrisburg. No journey is complete without seeing Liberty Bell, Independence Hall and Philadelphia Museum of Art.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.