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$287 Cheap Flights from Seattle (SEA) to Harrisburg (MDT)

View $287 flight on Sun, Nov 8, 2026Opens 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 $287 for one-way flights and $361 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Oct 10 - Tue, Oct 13
SEA
Seattle
MDT
Harrisburg
$361 Roundtrip, found 1 day ago
$361
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Oct 10 from Seattle to Harrisburg, returning Tue, Oct 13, priced at $361 found 1 day ago
Delta
Wed, Nov 4 - Wed, Nov 11
SEA
Seattle
MDT
Harrisburg
$361 Roundtrip, found 2 days ago
$361
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Nov 4 from Seattle to Harrisburg, returning Wed, Nov 11, priced at $361 found 2 days ago
United
Sat, Oct 10 - Tue, Oct 13
SEA
Seattle
MDT
Harrisburg
$361 Roundtrip, found 1 day ago
$361
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 10 from Seattle to Harrisburg, returning Tue, Oct 13, priced at $361 found 1 day ago
United
Sat, Jan 9 - Sat, Jan 16
SEA
Seattle
MDT
Harrisburg
$366 Roundtrip, found 2 days ago
$366
Roundtrip
found 2 days ago
Select United flight, departing Sat, Jan 9 from Seattle to Harrisburg, returning Sat, Jan 16, priced at $366 found 2 days ago
United
Tue, Sep 29 - Tue, Oct 6
SEA
Seattle
MDT
Harrisburg
$370 Roundtrip, found 22 hours ago
$370
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Sep 29 from Seattle to Harrisburg, returning Tue, Oct 6, priced at $370 found 22 hours ago
United
Sat, Oct 24 - Sat, Oct 31
SEA
Seattle
MDT
Harrisburg
$371 Roundtrip, found 6 days ago
$371
Roundtrip
found 6 days ago
Select United flight, departing Sat, Oct 24 from Seattle to Harrisburg, returning Sat, Oct 31, priced at $371 found 6 days ago
United
Tue, Sep 29 - Tue, Oct 6
SEA
Seattle
MDT
Harrisburg
$375 Roundtrip, found 22 hours ago
$375
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Sep 29 from Seattle to Harrisburg, returning Tue, Oct 6, priced at $375 found 22 hours ago
American Airlines
Fri, Nov 13 - Sun, Nov 15
SEA
Seattle
MDT
Harrisburg
$379 Roundtrip, found 9 hours ago
$379
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Fri, Nov 13 from Seattle to Harrisburg, returning Sun, Nov 15, priced at $379 found 9 hours ago
United
Wed, Sep 30 - Tue, Oct 13
SEA
Seattle
MDT
Harrisburg
$383 Roundtrip, found 4 days ago
$383
Roundtrip
found 4 days ago
Select United flight, departing Wed, Sep 30 from Seattle to Harrisburg, returning Tue, Oct 13, priced at $383 found 4 days ago
Alaska Airlines
Wed, May 5 - Sat, May 8
SEA
Seattle
MDT
Harrisburg
$615 Roundtrip, found 3 hours ago
$615
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Wed, May 5 from Seattle to Harrisburg, returning Sat, May 8, priced at $615 found 3 hours ago

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 $418
MDT
Harrisburg Intl.
Cheapest
Average driving time to city center16 min
Flights from $418

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

February is typically the cheapest month to fly

From $258 - $546 per traveler.

What you need to know for your flight from Seattle - Tacoma Intl. to Harrisburg Intl.

Seattle (SEA) to Harrisburg (MDT) at a glance

Embark on your journey from Seattle-Tacoma International Airport (SEA) to Harrisburg International Airport (MDT) with a selection of airlines offering a range of options. Whether you're looking for full-service carriers or budget-friendly choices, you can compare seattle to harrisburg flights to find the itinerary that aligns with your budget and schedule. Explore the renowned sights and neighborhoods of Harrisburg as you plan your travel from Seattle to Harrisburg.

  • Fastest flight duration: around 6 hours in-flight, plus roughly 1h 30m layover with one stop
  • Route distance: roughly 2,300 miles (3,700 km)
  • Flights per week: around 13 departures on average
  • Typical fares (one-way): economy tickets often range from $130–$480, depending on seasonality and how far ahead you book

Flights from Seattle - Tacoma International Airport (SEA) to Harrisburg International Airport (MDT)

Based on recent travel bookings, here are the top airlines favored for one-stop and multi-stop flights from Seattle to Harrisburg. Common layover points include O'Hare International Airport, ORD (approximately 1 hour and 15 minutes), Philadelphia International Airport, PHL (around 1 hour and 30 minutes), and Washington Dulles International Airport, IAD (about 1 hour and 30 minutes). These options provide you with the flexibility to balance price, total travel time, and cabin class to create the ideal itinerary.

  • American Airlines: This full-service airline provides both one-stop and multi-stop options, with one-way fares generally ranging from $130 to $440. It makes up about 43% of the departures on this route, offering an in-flight duration of 6 hours and a total travel time of approximately 7 hours and 30 minutes.
  • United: Another full-service option, United offers one-stop service with one-way fares typically between $145 and $585. It operates around 38% of flights on this route, featuring a flight time of 6 hours and a total journey duration of about 7 hours and 30 minutes, including layover time.
  • Delta: This full-service carrier also provides one-stop flights, with one-way fares usually falling between $130 and $570. Delta accounts for roughly 13% of departures along this route, with an in-flight time of 6 hours and a total travel duration of around 7 hours and 30 minutes, including any layovers.
  • Alaska Airlines: Alaska Airlines offers a full-service one-stop option, with one-way fares typically ranging from $180 to $545. It represents about 6% of the departures on this route, featuring a flight time of 6 hours and a total journey time of approximately 7 hours and 30 minutes, including layover time.

Travelers flying from Seattle to Harrisburg have the option to upgrade their experience, with first-class service available on this route through United and American Airlines.

Best time to fly from Seattle (SEA) to Harrisburg (MDT)

The most popular months for travelers flying from Seattle to Harrisburg are April, June, and August, when peak temperatures in Harrisburg reach up to 72.9°F in August. If you prefer quieter travel, consider February, the least busy time to visit with temperatures around 32.2°F and typically the lowest average one-way fare (around $240). Flight availability peaks in August, with approximately 20 flights per week, making it easier to find convenient departure times.

  • Cheapest time to fly: February usually offers good deals with average one-way fare around $240, roughly 13% cheaper than the yearly average.
  • Another budget-friendly time to fly: October typically offers an average one-way fare of around $251.
  • Most flight options: August has the highest number of flights from Seattle to Harrisburg, with approximately 20 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January29.8°F (-1.2°C)Average12$267
February32.2°F (0.1°C)Low9$240
March40.3°F (4.6°C)Average11$288
April51.3°F (10.7°C)High12$289
May61.3°F (16.3°C)Average14$296
June69.6°F (20.9°C)High15$267
July75.2°F (24.0°C)Average16$271
August72.9°F (22.7°C)High20$299
September66.2°F (19.0°C)Average13$311
October55.0°F (12.8°C)Average12$251
November42.8°F (6.0°C)Low11$274
December35.6°F (2.0°C)Low12$276

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Seattle (SEA) to Harrisburg (MDT)

  • Seattle to Harrisburg (SEA-HAR): Located approximately 5 miles from Harrisburg International Airport (MDT), Capital City Airport (HAR) serves as a convenient alternative.
  • Seattle to Harrisburg (BFI-MDT): Boeing Field Airport (BFI) lies around 6 miles from Seattle-Tacoma International Airport (SEA), offering easy access for travelers.
  • Seattle to Lancaster (SEA-LNS): Lancaster Airport (LNS) is situated about 25 miles from Harrisburg International Airport (MDT), providing another viable route.

How to find the best prices for flights from Seattle (SEA) to Harrisburg (MDT)

Getting some of the best deals on flights from Seattle to Harrisburg is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2-8 weeks in advance, which coincides with when most travelers make their reservations. Morning departures between 5 AM and 12 PM not only tend to offer lower prices but are also the most popular. Additionally, flying on Wednesday generally provides cheaper rates, while Thursday is the most favored travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Harrisburg hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Harrisburg International Airport from Seattle - Tacoma International Airport

Harrisburg welcomes travelers from Seattle with a range of transport options based on price, convenience, and proximity. For departures, Seattle - Tacoma International Airport is roughly a 20-minute drive (covering about 14 miles) from central Seattle. Harrisburg city center is approximately a 15-minute drive (covering about 12 miles) from Harrisburg International Airport, depending on traffic. Here's how to reach Harrisburg efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Harrisburg, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Harrisburg International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Harrisburg International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Harrisburg International Airport, Middletown Station, a train station, is located about 1.8 miles away by car, providing convenient access for travelers.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) cost?
You can find cheap one-way flights from $287 and cheap return flights from $361 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) with Expedia. One-way flights generally range between $179 and $1139, and roundtrip flights usually range from $390 to $1565. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
The cheapest month to fly from SEA to MDT is October when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
Enter SEA to MDT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
Frontier Airlines is one of the cheapest airlines offering connecting flights from Seattle - Tacoma Intl. (SEA) to Harrisburg Intl. (MDT), with round-trip tickets starting from around $427 with a layover in Harry Reid Intl. (LAS). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
The earliest flight from Seattle - Tacoma International Airport (SEA) to Harrisburg International Airport (MDT) typically departs at around 12:05 AM local time, operated by American Airlines. This is a seasonal service active in March, allowing you to start your journey early and make the most of your time in Harrisburg. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
The most popular departure times for flights from Seattle-Tacoma International Airport (SEA) to Harrisburg International Airport (MDT) are in the early morning, from 6am to 9am. About 28% of passengers prefer this time window. Many major carriers, including United Airlines, American Airlines, and Delta Airlines, offer flights during this window. This timing is favored as it allows you to make the most of your day upon arrival.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
A flight from SEA to MDT with a layover takes around 7 hours 20 minutes, with the route covering approximately 2,291 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
First class seats are offered on the SEA to MDT route. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Harrisburg from Seattle - Tacoma Intl. (SEA)?
If you're planning to travel to Harrisburg from Seattle - Tacoma Intl. (SEA), you can fly into Harrisburg Intl. (MDT) Some flights may connect through major hubs like Denver Intl. (DEN), San Francisco Intl. (SFO), Sky Harbor Intl. (PHX) before reaching Harrisburg. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Harrisburg Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$360
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 October. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $287 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

*Flight schedules are subject to change.

*Available to One Key members.

 

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