$194 Cheap Alaska Airlines flights Seattle (SEA) to Harrisburg (MDT)

Scoring cheap one-way Alaska Airlines flights from SEA to MDT from $194 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $381 for your next adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines flights to Harrisburg are often cheaper in the quieter months of January and December. Whether you need a one-way or round-trip ticket, you could find a better deal then.

To find cheap Alaska Airlines fares from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg Intl. Airport (MDT), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect the overall price. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Simply enter your dates, press search and check the “Nonstop” filter on Expedia to find any direct flights from SEA to MDT with Alaska Airlines or other airlines.

Filter your results by “Early Morning” and “Morning” to browse the earliest flights from SEA to MDT. Taking off early means you’re 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Harrisburg come in to Harrisburg Intl. Airport (MDT). This is the main entry point to this destination.

Traveling from SEA to MDT with Alaska Airlines comes with a host of benefits, such as an excellent in-flight experience and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s on top of the Mileage Plan points you can earn with Alaska Airlines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

In most cases, you can cancel or modify your flight, although there may be additional fees if your booking was made more than 24 hours ago. Want to keep your options open? Use Expedia’s “No cancel fee” or “Changes included” filter to find flights that won’t penalize you if you need to alter your plans. To make modifications, head to “Trips,” select your flight and click on “Manage Booking” for further information.