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$130+ Cheap flights from Harrisburg to Seattle (MDT - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — SEA
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Harrisburg to Seattle/Tacoma Intl are usually found in February or March, booked 48 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Find flight deals from Harrisburg to Seattle

Cheapest flights from Harrisburg to Seattle
Explore the most affordable flight options available from Harrisburg to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 23, 2025.

This American Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/104:36 pmMDT - SEA
1 stop9h 42mAmerican Airlines
Wed 11/129:00 amSEA - MDT
1 stop9h 58mAmerican Airlines
Deal found 10/22$289
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:00 amMDT - SEA
1 stop11h 01mDelta
Tue 11/1111:10 pmSEA - MDT
1 stop9h 45mDelta
Deal found 10/22$319
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/82:35 pmMDT - SEA
1 stop9h 19mUnited Airlines
Sun 11/97:28 pmSEA - MDT
2 stops11h 07mUnited Airlines
Deal found 10/22$324
This American Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/83:55 pmMDT - SEA
1 stop8h 04mAmerican Airlines
Sat 11/812:59 amSEA - MDT
1 stop7h 13mAmerican Airlines
Deal found 10/22$338
This American Airlines deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:20 amMDT - SEA
1 stop9h 50mAmerican Airlines
Sun 11/91:53 pmSEA - MDT
1 stop7h 26mAmerican Airlines
Deal found 10/20$344
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:00 amMDT - SEA
1 stop7h 40mDelta
Thu 12/186:00 amSEA - MDT
1 stop9h 32mDelta
Deal found 10/22$349
This United Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/202:35 pmMDT - SEA
1 stop9h 19mUnited Airlines
Fri 11/2811:30 pmSEA - MDT
1 stop7h 36mUnited Airlines
Deal found 10/21$359
This United Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/222:35 pmMDT - SEA
2 stops11h 35mUnited Airlines
Fri 11/2811:30 pmSEA - MDT
1 stop7h 36mUnited Airlines
Deal found 10/21$364
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/76:30 amMDT - SEA
1 stop7h 58mUnited Airlines
Tue 11/1111:34 pmSEA - MDT
2 stops11h 24mUnited Airlines
Deal found 10/22$375
This American Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/166:20 amMDT - SEA
1 stop9h 49mAmerican Airlines
Sun 11/2311:20 pmSEA - MDT
1 stop8h 04mAmerican Airlines
Deal found 10/23$378
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/612:09 pmMDT - SEA
1 stop9h 14mDelta
Wed 11/126:00 amSEA - MDT
1 stop9h 16mDelta
Deal found 10/22$379

Cheap flight deals from Harrisburg to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Harrisburg (MDT) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$259
(American Airlines)

One-way from

$130
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$441
Provider with most accurate pricing for Harrisburg-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Harrisburg-Seattle/Tacoma Intl flights.
Search Deals
From Harrisburg to Seattle/Tacoma Intl
Search Deals
One-way flight from Harrisburg to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated October 23, 2025.
Use the filters below to find and compare flights from Harrisburg to Seattle that are best for you.

Fly from

Harrisburg

Fly to

Seattle

Route

Depart

Return

Price

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Tue 2/17

5:40 pm-10:43 pm

1 stop8h 03m

Seattle/Tacoma Intl

Sun 2/22

7:10 pm-9:37 am

2 stops11h 27m

$303

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Wed 11/5

2:55 pm-10:20 pm

1 stop10h 25m

Seattle/Tacoma Intl

Sat 11/8

12:59 am-11:12 am

1 stop7h 13m

$319

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Mon 11/24

6:30 am-11:28 am

1 stop7h 58m

Seattle/Tacoma Intl

Fri 11/28

11:30 pm-10:06 am

1 stop7h 36m

$359

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Thu 11/20

2:35 pm-8:54 pm

1 stop9h 19m

Seattle/Tacoma Intl

Fri 11/28

11:30 pm-10:06 am

1 stop7h 36m

$359

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Thu 2/19

2:33 pm-10:59 pm

2 stops11h 26m

Seattle/Tacoma Intl

Mon 2/23

11:59 pm-10:09 am

1 stop7h 10m

$364

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Sat 2/28

6:29 am-11:49 am

1 stop8h 20m

Seattle/Tacoma Intl

Tue 3/3

7:29 pm-10:09 am

2 stops11h 40m

$364

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Thu 12/18

5:00 am-10:02 am

1 stop8h 02m

$130

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Tue 11/11

5:40 am-11:40 am

1 stop9h 00m

$130

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Wed 11/12

2:55 pm-10:20 pm

1 stop10h 25m

$130

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Wed 11/12

8:15 am-4:15 pm

2 stops11h 00m

$135

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 13 results
1
2

Compare providers for flights from Harrisburg to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Harrisburg to Seattle in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Harrisburg-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harrisburg-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harrisburg-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harrisburg-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harrisburg-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Harrisburg to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Harrisburg with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Harrisburg to Seattle. Price data was last updated on October 17, 2025.

Booking 36 days in advance of your planned departure date is, on average, the best time to get cheap flights from Harrisburg to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Harrisburg to Seattle?

Currently, March is the cheapest month in which you can book a flight from Harrisburg to Seattle (average of $107). Flying from Harrisburg to Seattle in December is currently the most expensive (average of $242). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Harrisburg to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated October 23, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines from Harrisburg to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,161 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,161 reviews
Alaska Airlines
8.0
Very good
11,161 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
7,982 reviews
Alaska Airlines
8.0
Very good
11,161 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,995 reviews
Alaska Airlines
8.0
Very good
11,161 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
American Airlines
7.2
Good
11,033 reviews
Alaska Airlines
8.0
Very good
11,161 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

Related info for your journey

Find useful and relevant information for your journey from Harrisburg to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Harrisburg to Seattle?

    A quick flight from Harrisburg to Seattle can take about 8h 03m. American Airlines provides one of the quickest options available for as low as $303. The distance between Harrisburg and Seattle is about 2289 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Harrisburg to Seattle round-trip?

    United Airlines, at $286, was found to be the cheapest airline from Harrisburg to Seattle.Alternate airlines to your destination round-trip include Delta and American Airlines. These flights start at 40% lower than the current average price 3 months from now.

  • Can I find deals for flights from Harrisburg to Seattle that include hotel bookings?

    Yes. In addition to deals on Harrisburg to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Harrisburg to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harrisburg to Seattle.

  • Can I find deals for business class flights from Harrisburg to Seattle?

    Yes. Cheapflights offers flight deals from Harrisburg to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Harrisburg to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Harrisburg to Seattle (average of $107). Flying from Harrisburg to Seattle in December is currently the most expensive (average of $242). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Kirkland
Fife
Issaquah

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Alternative routes for Harrisburg to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Harrisburg to Seattle

Discover the top 4 airlines that operate flights from Harrisburg to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$286Average$480FlexibilityNo cancel feeOn-time69%
DeltaCheapest$286Average$436FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$301Average$516FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$427Average$648FlexibilityNo cancel feeOn-time75%

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