MDT - SEA

$150 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
$299
Overall average: $388
United Airlines
Fri 5/1Sun 5/3
MDT - SEA • 1 stop
Cheapest one-way
$150
Typical prices: $218-$373
Delta
Sun 5/24
MDT - SEA • 1 stop
Top airlines
Cheapest • from $299 (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
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $419 (round-trip)
Shortest trip • 7h 54m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 25% compared to booking last minute.
Insights
Insights
Insights
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

Fri, May 1 - Sun, May 3
United Airlines Logo
5:54 pm - 11:59 pm
MDT
-
SEA
9h 05m
1 stop
United Airlines Logo
10:41 pm - 9:44 am
SEA
-
MDT
8h 03m
1 stop
$299United Airlines
Fri, May 1 - Sun, May 3
United Airlines Logo
5:54 pm - 10:47 pm
MDT
-
SEA
7h 53m
1 stop
United Airlines Logo
7:05 pm - 9:44 am
SEA
-
MDT
11h 39m
2 stops
$304United Airlines
Wed, Sep 9 - Tue, Sep 22
United Airlines Logo
6:15 am - 2:27 pm
MDT
-
SEA
11h 12m
2 stops
United Airlines Logo
10:47 pm - 2:03 pm
SEA
-
MDT
12h 16m
2 stops
$309United Airlines
Wed, May 13 - Wed, May 20
United Airlines Logo
5:54 pm - 10:47 pm
MDT
-
SEA
7h 53m
1 stop
United Airlines Logo
2:27 pm - 12:55 am
SEA
-
MDT
7h 28m
1 stop
$319United Airlines
Fri, Apr 3 - Tue, Apr 7
United Airlines Logo
5:53 pm - 12:34 am
MDT
-
SEA
9h 41m
1 stop
United Airlines Logo
11:59 pm - 10:09 am
SEA
-
MDT
7h 10m
1 stop
$324United Airlines
Tue, Aug 18 - Wed, Aug 26
United Airlines Logo
6:15 am - 2:27 pm
MDT
-
SEA
11h 12m
2 stops
United Airlines Logo
10:47 pm - 9:31 am
SEA
-
MDT
7h 44m
1 stop
$327United Airlines
Fri, Apr 10 - Tue, Apr 14
American Airlines Logo
4:36 pm - 10:38 pm
MDT
-
SEA
9h 02m
1 stop
American Airlines Logo
10:25 am - 11:25 pm
SEA
-
MDT
10h 00m
1 stop
$329American Airlines
Wed, Sep 9 - Tue, Sep 22
United Airlines Logo
6:15 am - 2:27 pm
MDT
-
SEA
11h 12m
2 stops
United Airlines Logo
10:47 pm - 2:03 pm
SEA
-
MDT
12h 16m
2 stops
$332United Airlines
Thu, Sep 10 - Mon, Sep 21
United Airlines Logo
2:53 pm - 8:03 pm
MDT
-
SEA
8h 10m
1 stop
United Airlines Logo
10:47 pm - 9:31 am
SEA
-
MDT
7h 44m
1 stop
$339United Airlines
Sat, Sep 5 - Tue, Sep 8
United Airlines Logo
5:53 pm - 10:42 pm
MDT
-
SEA
7h 49m
1 stop
United Airlines Logo
7:00 am - 4:51 pm
SEA
-
MDT
6h 51m
1 stop
$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.

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 July and May, where the average cost of round-trip tickets is $521 and $507 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 25% 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$150
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly with an average 20% 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 $150 for a one-way ticket and $299 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, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Harrisburg to Seattle are Delta and Alaska Airlines. With an average price for the route of $436 and an overall rating of 7.9, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $592 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 12052 reviews
7.8Comfort
8.1Boarding
7.1Food
8.5Crew
7.0Entertainment
Airline reviews

Never got on because first part of trip was cancelled and we have no idea when we will get rebooked…

2.0 MediocreAnonymous, Mar 2026
PDX - SEA
Read more Alaska Airlines reviews

Never got on because first part of trip was cancelled and we have no idea when we will get rebooked…

They cancelled the flight and provided no support to find another way home or how to get a refund. Links provided didn’t work and phone wait times were over eight hours. Battery on my phone couldn’t last long enough.

signage from the upper area to the tram down 2 escalator!

The WiFi worked for entertainment but a nearly 4 hour flight should have personal tvs

Generally very good. Waiting (due to de-icing and traffic) in plane to take off was a put-off. But it's not the airline's fault. I find Airbus more comfortable than Boeing.

Lot's of good food and free entanglement made the trip pleasurable and fun.

The food was terrible, worse that what you get with UA, an already one of the lowest standards to beat. How cheap one could be, providing that kind of junk food in first class. Unbelievable! The seats were not very comfortable either. And there were no screens either, not that I cared much but for you to know.

Easy check-in. Good customer service. Had to check carry-on due to lack of overhead space. Wish the airplane was configured with more overhead area so this doesn't usually happen.

Great flights, little turbulence, pilots kept stewardesses seated & safe, all staff friendly & professional

There is no entertainment on the plane. The snack is minimal. The crew was nice and professional.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

Staff was great! Kind and cordial! Middle seat row 28 seat B has a hump in it. Trays were getting stuck when putting down and up. Good flight

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

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.

They are always late and seats was also not having working charger

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

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

Information on your arrival and departure airports