MDT - SEA

$149 Find Cheap Flights from Harrisburg to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harrisburg to Seattle departing on 5/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harrisburg to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harrisburg to Seattle, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$261
Typical prices: $666-$318
American Airlines
Tue 8/18Tue 8/25
MDT - SEA • 1 stop
Cheapest one-way
$149
Typical prices: $249-$373
American Airlines
Sun 5/24
MDT - SEA • 1 stop
Top airlines
Cheapest • from $261 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Harrisburg and Seattle. You'll need at least 1 connection.
Insights
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Insights
Top layover airports
Cheapest • Avg $424 (round-trip)
Shortest trip • 8h 03m (one-way)
Insights
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Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 22% compared to booking last minute.
Insights
Insights
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Insights
When to travel
Cheapest • 31% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Harrisburg to Seattle (MDT-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harrisburg to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Harrisburg to Seattle

Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
1:22 pm - 8:52 pm
MDT
-
SEA
10h 30m
1 stop
American Airlines Logo
11:59 pm - 12:42 pm
SEA
-
MDT
9h 43m
1 stop
$261American Airlines
Mon, Oct 26 - Wed, Dec 9
Delta Logo
12:25 pm - 6:59 pm
MDT
-
SEA
9h 34m
1 stop
Delta Logo
6:00 am - 4:08 pm
SEA
-
MDT
7h 08m
1 stop
$279Delta
Tue, Jun 2 - Tue, Jun 9
American Airlines Logo
7:25 pm - 12:16 am
MDT
-
SEA
7h 51m
1 stop
American Airlines Logo
10:35 pm - 10:08 am
SEA
-
MDT
8h 33m
1 stop
$297American Airlines
Wed, Jul 15 - Wed, Jul 22
American Airlines Logo
5:00 pm - 12:52 am
MDT
-
SEA
10h 52m
1 stop
American Airlines Logo
5:10 am - 5:13 pm
SEA
-
MDT
9h 03m
1 stop
$306American Airlines
Wed, Jun 3 - Sun, Jun 7
American Airlines Logo
7:17 pm - 12:16 am
MDT
-
SEA
7h 59m
1 stop
American Airlines Logo
10:35 pm - 10:08 am
SEA
-
MDT
8h 33m
1 stop
$310American Airlines
Wed, Jun 3 - Sat, Jun 6
American Airlines Logo
7:17 pm - 12:16 am
MDT
-
SEA
7h 59m
1 stop
American Airlines Logo
5:15 am - 5:11 pm
SEA
-
MDT
8h 56m
1 stop
$324American Airlines
Fri, Jun 5 - Sun, Jun 7
American Airlines Logo
7:08 pm - 12:41 am
MDT
-
SEA
8h 33m
1 stop
American Airlines Logo
10:35 pm - 10:08 am
SEA
-
MDT
8h 33m
1 stop
$328American Airlines
Thu, Aug 13 - Wed, Aug 19
American Airlines Logo
1:22 pm - 8:52 pm
MDT
-
SEA
10h 30m
1 stop
American Airlines Logo
11:59 pm - 12:42 pm
SEA
-
MDT
9h 43m
1 stop
$330American Airlines
Sat, May 23 - Sat, May 30
American Airlines Logo
7:17 pm - 12:24 am
MDT
-
SEA
8h 07m
1 stop
American Airlines Logo
10:35 pm - 10:08 am
SEA
-
MDT
8h 33m
1 stop
$342American Airlines
Tue, Oct 20 - Sat, Oct 24
United Airlines Logo
5:31 pm - 10:29 pm
MDT
-
SEA
7h 58m
1 stop
United Airlines Logo
8:30 am - 9:20 pm
SEA
-
MDT
9h 50m
2 stops
$344United Airlines
Booking Insights

KAYAK's insights & trends for Harrisburg to Seattle flights

Get data-powered insights and trends into flights from Harrisburg to Seattle to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Harrisburg to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Harrisburg to Seattle departing in August.

What is the cheapest month to fly from Harrisburg to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harrisburg to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Harrisburg to Seattle is January, where tickets cost $298 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $571 and $513 respectively.

How far in advance should I book a flight from Harrisburg to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Harrisburg to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Harrisburg to Seattle, you should book around 3 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$149
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Harrisburg to Seattle

When to book flights from Harrisburg to Seattle

Are your dates flexible? Find out the best times to travel from Harrisburg to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Harrisburg to Seattle

  • What is the cheapest flight from Harrisburg to Seattle?

    In the last 3 days, the lowest price for a flight from Harrisburg to Seattle was $149 for a one-way ticket and $261 for a round-trip.

  • Do I need a passport to fly between Harrisburg and Seattle?

    A passport is not required to fly from Harrisburg to Seattle.

  • Which airports will I be using when flying from Harrisburg to Seattle?

    On your way to Seattle, you’ll fly out from Harrisburg. You’ll be landing at Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Harrisburg to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Harrisburg to Seattle?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Harrisburg and Seattle, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Harrisburg to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Harrisburg to Seattle are Alaska Airlines and Delta. With an average price for the route of $696 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $418 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Harrisburg to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Harrisburg to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Harrisburg to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Harrisburg is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Harrisburg to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Harrisburg with another airline. Booking your flights between Harrisburg and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harrisburg to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Harrisburg up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Harrisburg to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Harrisburg to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Harrisburg to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12331 reviews
7.0Entertainment
8.5Crew
8.1Boarding
7.8Comfort
7.1Food
Airline reviews

Check in went smooth, flight was on time and our checked bag was delivered in a timely fashion.

10.0 ExcellentBill, May 2026
MKE - SEA
Read more Alaska Airlines reviews

Check in went smooth, flight was on time and our checked bag was delivered in a timely fashion.

I had to cancel my trip due to medical reasons. I have been unable to cancel online through either Kayak or Alaska Airlines.. I am trying to get my insured trip reimbursed by XCover. They are requiring a notice of cancellation or not using to get my refund. Please help me get that information. I have been unable to get this information from either Kayak or Alaska Airlines.

We got window seats and there was no window to look out at very disappointed in paying for a no window seat

We took off on time and rose into the wild blue yonder safely, and landed at our destination safely eighteen minutes early. In between we enjoyed a smooth flight and wonderful service by a great crew. Flight attendants and pilots made sure the trip was a memorable and happy experience. Can’t beat that!

Affirmed my disability by allowing me to board when most accessible. Very parable, helpful and friendly staff. Smooth flight overall! I always fly Alaska when possible! Thank you!

Our flight from Raleigh to Seattle delayed by hour plus. We missed connection as we couldn’t get to next gate in time Then we waited till 2:30 plane and then sat on tarmac loaded for half hour then our luggage couldn’t be found finally found where it was 2 employees sent us in wrong direction

They were really helpful with every question and my kids had never been on a plane and the staff made them feel comfortable

The merging of Kayak & the airline’s website was not always clear. Both on their own provided adequate Information about the flight. I had some challenges retrieving the boarding pass. I relied on the agent & may have paid the baggage fee twice.

Tucson AS767 flight yesterday from Tucson to SeaTac international Flight left Tucson around 7:44 am My name is Tanya Blendheim and I had a horrible experience yesterday morning at Alaska Airlines desk leaving from Tucson AZ. The agent was extremely rude and questioned everything about my trip. First she said (in a less than pleasant tone) you know your flight boards in 8 minutes? And we stop checking luggage 15 minutes before boarding. I acknowledged the first statement, but said that I didn't know about the check bag policy. (Another passenger, a man, was right behind me and he was denied checking his bag, which made him have to go back to his car to leave liquids behind) I also needed wheelchair assistance for my friend. I ended getting the wheelchair myself. The agent also said I wasn't checked in, which I was. One person in our group was no longer flying. She also said I had to pay $40 to check my bag and that my bag was 6 pounds over. The thing is, everything she said to me was said in a sassy tone and that was not professional or necessary. There are ways of informing customers of what is happening, without being condescending or rude.

very nice blankets and comfortable seats. great service. Great flights.

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

No screens or meal options. Freezing cold. Dirty seats. Left late.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The captain announced to the cabin there would be a delay because they observed a "cut" on a tire during precheck that needed to be cleared by maintenance. We were delayed during this inspection and allowed to proceed after maintenance "measured the cut and decided it was acceptable". My complaint is not about the delay or due diligence. I wish the captain had been more generic when making his announcement. I was a nervous wreck all the way to Charlotte worried that we would have a blowout when landing!

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

Everything you need to know for your flight from Harrisburg to Seattle

Information on your arrival and departure airports