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Cheap flights from Harrisburg to Seattle from $154

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Harrisburg to Seattle departing on 10/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Delta Logo
6:00 am - 2:01 pmMDT-SEA
11h 01m1 stop
Delta Logo
11:10 pm - 11:45 amSEA-MDT
9h 35m1 stop
$302Delta
Find Deal
Thu, Oct 30 - Thu, Nov 27
American Airlines Logo
6:20 am - 1:09 pmMDT-SEA
9h 49m1 stop
American Airlines Logo
11:20 pm - 10:24 amSEA-MDT
8h 04m1 stop
$307American Airlines
Find Deal
Thu, Nov 20 - Sun, Nov 23
American Airlines Logo
6:20 am - 1:09 pmMDT-SEA
9h 49m1 stop
American Airlines Logo
11:20 pm - 10:24 amSEA-MDT
8h 04m1 stop
$332American Airlines
Find Deal
Sun, Nov 9 - Tue, Nov 11
Delta Logo
6:10 am - 10:45 amMDT-SEA
7h 35m1 stop
Delta Logo
11:45 am - 10:47 pmSEA-MDT
8h 02m1 stop
$333Delta
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
8:15 am - 3:45 pmMDT-SEA
10h 30m1 stop
United Airlines Logo
10:50 am - 9:25 pmSEA-MDT
7h 35m1 stop
$338United Airlines
Find Deal
Wed, Oct 1 - Wed, Oct 8
American Airlines Logo
6:40 am - 1:54 pmMDT-SEA
10h 14m2 stops
American Airlines Logo
10:07 pm - 10:29 amSEA-MDT
9h 22m1 stop
$357American Airlines
Find Deal
Thu, Nov 20 - Sun, Nov 23
American Airlines Logo
6:30 am - 12:00 pmMDT-SEA
8h 30m1 stop
American Airlines Logo
12:34 am - 11:10 amSEA-MDT
7h 36m1 stop
$363American Airlines
Find Deal
Wed, Oct 1 - Tue, Oct 7
United Airlines Logo
6:30 am - 11:30 amMDT-SEA
8h 00m1 stop
United Airlines Logo
7:28 pm - 9:35 amSEA-MDT
11h 07m2 stops
$366United Airlines
Find Deal
Sun, Nov 16 - Tue, Nov 18
Alaska Airlines Logo
6:00 am - 12:34 pmMDT-SEA
9h 34m1 stop
Alaska Airlines Logo
12:17 am - 11:01 amSEA-MDT
7h 44m1 stop
$583Alaska Airlines
Find Deal
Tue, Sep 30 - Fri, Oct 3
Alaska Airlines Logo
6:00 am - 12:39 pmMDT-SEA
9h 39m1 stop
Alaska Airlines Logo
9:59 am - 10:15 pmSEA-MDT
9h 16m1 stop
$612Alaska Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6

American Airlines flights from Harrisburg to Seattle

Our best American Airlines deals on Harrisburg to Seattle flight tickets
American Airlines
Nov 20
MDT6:20 amHarrisburg
9h 49m
1 stop
SEA1:09 pmSeattle/Tacoma Intl
Nov 23
SEA11:20 pmSeattle/Tacoma Intl
8h 04m
1 stop
MDT10:24 amHarrisburg
$307
Find similar
American Airlines
Nov 9
MDT6:20 amHarrisburg
9h 49m
1 stop
SEA1:09 pmSeattle/Tacoma Intl
Nov 11
SEA11:20 pmSeattle/Tacoma Intl
8h 04m
1 stop
MDT10:24 amHarrisburg
$332
Find similar
American Airlines
Nov 20
MDT6:40 amHarrisburg
10h 14m
2 stops
SEA1:54 pmSeattle/Tacoma Intl
Nov 23
SEA10:07 pmSeattle/Tacoma Intl
9h 22m
1 stop
MDT10:29 amHarrisburg
$357
Find similar

United Airlines flights from Harrisburg to Seattle

Our best United Airlines deals on Harrisburg to Seattle flight tickets
United Airlines
Oct 1
MDT8:15 amHarrisburg
10h 30m
1 stop
SEA3:45 pmSeattle/Tacoma Intl
Oct 8
SEA10:50 amSeattle/Tacoma Intl
7h 35m
1 stop
MDT9:25 pmHarrisburg
$338
Find similar
United Airlines
Nov 16
MDT6:30 amHarrisburg
8h 00m
1 stop
SEA11:30 amSeattle/Tacoma Intl
Nov 18
SEA7:28 pmSeattle/Tacoma Intl
11h 07m
2 stops
MDT9:35 amHarrisburg
$366
Find similar
United Airlines
Oct 30
MDT2:35 pmHarrisburg
13h 24m
2 stops
SEA12:59 amSeattle/Tacoma Intl
Nov 27
SEA8:00 amSeattle/Tacoma Intl
7h 15m
1 stop
MDT6:15 pmHarrisburg
$382
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Harrisburg to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Harrisburg to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Thu 10/30

6:00 am-2:01 pm

1 stop11h 01m

Seattle/Tacoma Intl

Thu 11/27

11:10 pm-11:45 am

1 stop9h 35m

$302

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Thu 11/20

6:20 am-1:09 pm

1 stop9h 49m

Seattle/Tacoma Intl

Sun 11/23

11:20 pm-10:24 am

1 stop8h 04m

$307

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Sun 11/9

6:20 am-1:09 pm

1 stop9h 49m

Seattle/Tacoma Intl

Tue 11/11

11:20 pm-10:24 am

1 stop8h 04m

$332

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Tue 3/10

6:10 am-10:45 am

1 stop7h 35m

Seattle/Tacoma Intl

Wed 3/11

11:45 am-10:47 pm

1 stop8h 02m

$333

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Wed 10/1

8:15 am-3:45 pm

1 stop10h 30m

Seattle/Tacoma Intl

Wed 10/8

10:50 am-9:25 pm

1 stop7h 35m

$338

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Thu 11/20

6:40 am-1:54 pm

2 stops10h 14m

Seattle/Tacoma Intl

Sun 11/23

10:07 pm-10:29 am

1 stop9h 22m

$357

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Wed 10/1

6:30 am-12:00 pm

1 stop8h 30m

Seattle/Tacoma Intl

Tue 10/7

12:34 am-11:10 am

1 stop7h 36m

$363

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Sun 11/16

6:30 am-11:30 am

1 stop8h 00m

Seattle/Tacoma Intl

Tue 11/18

7:28 pm-9:35 am

2 stops11h 07m

$366

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Tue 9/30

6:00 am-12:34 pm

1 stop9h 34m

Seattle/Tacoma Intl

Fri 10/3

12:17 am-11:01 am

1 stop7h 44m

$583

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Thu 10/30

6:00 am-12:39 pm

1 stop9h 39m

Seattle/Tacoma Intl

Thu 11/6

9:59 am-10:15 pm

1 stop9h 16m

$612

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Harrisburg to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Harrisburg to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $371. If you don’t want to visit Seattle in February, then you should wait until March to fly from Harrisburg, when ticket prices are also cheap, with an average price of $386.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Harrisburg is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $508. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Harrisburg because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $643.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Harrisburg at noon is the least expensive time of day to depart. momondo users have found prices as low as $454 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $578. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Harrisburg to Seattle/Tacoma Intl flight route?

Fly from Harrisburg to Seattle/Tacoma Intl for the best Harrisburg - Seattle/Tacoma Intl flight prices

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

You are more likely to see cheaper flights to Seattle from Harrisburg when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $494 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Harrisburg for as low as $340 on momondo.

What cabin class options are available on Harrisburg to Seattle/Tacoma Intl flights?

There is only 1 cabin class available to choose from on Harrisburg to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Harrisburg to Seattle flights?

You could potentially save up to 5% on your flight if you consider stops on a Harrisburg to Seattle flight.

How have Harrisburg to Seattle flight prices changed over time?

As of September 2025, prices for Harrisburg to Seattle flights are approximately 16% more expensive when compared to flights at the same time last year.

When to book flights from Harrisburg to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Harrisburg to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Harrisburg to Seattle (MDT to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harrisburg to Seattle

Direct flights

None
There are no direct flights from Harrisburg to Seattle. There are no popular flight routes from Harrisburg to Seattle.
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  • How far is Harrisburg to Seattle/Tacoma Intl by plane?

    The straight-line distance from Harrisburg to Seattle/Tacoma Intl is 2281.5 mi. A reasonable flight in good conditions will take 7h 35m.

  • When did momondo last update prices for flights from Harrisburg Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Harrisburg Airport to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Harrisburg Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Harrisburg Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harrisburg Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Harrisburg to Seattle?

Best airlines flying from Harrisburg to Seattle

Compare and see reviews for airlines that fly from Harrisburg to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $286Free CancellationRating
7.9
7,961 reviews
Search Delta flights
American AirlinesPriceFrom $308Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $335Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $427Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Marysville
Puyallup
Federal Way
Kirkland
Tukwila
Shoreline
Lakewood
Centralia
Fife
Cle Elum
Redmond
Westport

Why use momondo?

Why should I use momondo to find a flight deal from Harrisburg to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Harrisburg to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Harrisburg to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from Harrisburg with this policy.

How can momondo help me find flights from Harrisburg to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Harrisburg. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Harrisburg to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Harrisburg to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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