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$154+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — SEA
Thg. 10 17 — Thg. 10 241
Th. 6 10/17
Th. 6 10/24
1 adult, Economy
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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

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 Tháng Chín 17, 2025.

Round-trip from

$302
(Delta)

One-way from

$154
(American Airlines)

Popular in

December

Cheapest in

February

Average price

$516
From Harrisburg to Seattle/Tacoma Intl
Search Deals
One-way flight from Harrisburg to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 5% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 Tháng Chín 17, 2025.

This Delta deal was found by Cheapflights users on 9/16. 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.
Th. 5 10/306:00 amMDT - SEA
1 stop11h 01mDelta
Th. 5 11/2711:10 pmSEA - MDT
1 stop9h 35mDelta
Deal found 9/16$302
This American Airlines deal was found by Cheapflights users on 9/17. 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.
Th. 5 11/132:55 pmMDT - SEA
1 stop10h 25mAmerican Airlines
Th. 2 11/1711:20 pmSEA - MDT
1 stop8h 04mAmerican Airlines
Deal found 9/17$307
This American Airlines deal was found by Cheapflights users on 9/15. 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.
CN 11/96:20 amMDT - SEA
1 stop9h 49mAmerican Airlines
Th. 4 11/1212:41 pmSEA - MDT
1 stop8h 12mAmerican Airlines
Deal found 9/15$332
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 4 10/18:15 amMDT - SEA
1 stop10h 30mUnited Airlines
Th. 4 10/810:50 amSEA - MDT
1 stop7h 35mUnited Airlines
Deal found 9/15$338
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Th. 6 10/36:30 amMDT - SEA
1 stop8h 01mUnited Airlines
Th. 4 10/87:37 pmSEA - MDT
2 stops10h 52mUnited Airlines
Deal found 9/17$343
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 5 11/206:40 amMDT - SEA
2 stops10h 14mAmerican Airlines
CN 11/2310:07 pmSEA - MDT
1 stop9h 22mAmerican Airlines
Deal found 9/15$357
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Th. 4 10/16:30 amMDT - SEA
1 stop8h 30mAmerican Airlines
Th. 3 10/712:34 amSEA - MDT
1 stop7h 36mAmerican Airlines
Deal found 9/16$363
This United Airlines deal was found by Cheapflights users on 9/17. 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.
CN 11/166:30 amMDT - SEA
1 stop8h 00mUnited Airlines
Th. 3 11/187:28 pmSEA - MDT
2 stops11h 07mUnited Airlines
Deal found 9/17$366
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Th. 5 10/302:35 pmMDT - SEA
2 stops13h 24mUnited Airlines
Th. 5 11/278:00 amSEA - MDT
1 stop7h 15mUnited Airlines
Deal found 9/16$382
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Th. 5 10/303:07 pmMDT - SEA
1 stop8h 03mAmerican Airlines
Th. 4 11/2612:59 amSEA - MDT
1 stop6h 57mAmerican Airlines
Deal found 9/16$402
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Th. 5 11/136:30 amMDT - SEA
1 stop7h 58mUnited Airlines
Th. 2 11/1712:41 pmSEA - MDT
3 stops17h 54mUnited Airlines
Deal found 9/17$417

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 Tháng Chín 17, 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

Th. 5 10/30

6:00 am-2:01 pm

1 stop11h 01m

Seattle/Tacoma Intl

Th. 5 11/27

11:10 pm-11:45 am

1 stop9h 35m

$302

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Th. 5 11/20

6:20 am-1:09 pm

1 stop9h 49m

Seattle/Tacoma Intl

CN 11/23

11:20 pm-10:24 am

1 stop8h 04m

$307

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Th. 4 11/5

2:55 pm-10:20 pm

1 stop10h 25m

Seattle/Tacoma Intl

Th. 2 11/10

10:07 pm-10:11 am

1 stop9h 04m

$307

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

CN 11/9

6:20 am-1:09 pm

1 stop9h 49m

Seattle/Tacoma Intl

Th. 3 11/11

11:34 am-10:56 pm

1 stop8h 22m

$332

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

CN 11/9

6:20 am-1:09 pm

1 stop9h 49m

Seattle/Tacoma Intl

Th. 4 11/12

12:41 pm-11:53 pm

1 stop8h 12m

$332

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Th. 3 3/10

5:00 pm-10:25 pm

1 stop8h 25m

Seattle/Tacoma Intl

Th. 4 3/11

11:45 am-10:47 pm

1 stop8h 02m

$333

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Th. 4 10/1

8:15 am-3:45 pm

1 stop10h 30m

Seattle/Tacoma Intl

Th. 4 10/8

10:50 am-9:25 pm

1 stop7h 35m

$338

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Th. 6 10/3

4:36 pm-10:04 pm

1 stop8h 28m

Seattle/Tacoma Intl

Th. 4 10/8

10:39 am-11:48 pm

1 stop10h 09m

$363

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

CN 11/16

6:30 am-11:30 am

1 stop8h 00m

Seattle/Tacoma Intl

Th. 3 11/18

7:28 pm-9:35 am

2 stops11h 07m

$366

HarrisburgSeattle

MDT - SEA

MDTSEA

Harrisburg

Th. 7 10/18

3:30 pm-8:46 pm

1 stop8h 16m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 14 results
1
2

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 September 12, 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, January is the cheapest month in which you can book a flight from Harrisburg to Seattle (average of $238). Flying from Harrisburg to Seattle in June is currently the most expensive (average of $387). 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.

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 Tháng Chín 17, 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
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Boarding

8.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Boarding

8.1

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
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Boarding

8.1

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
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Boarding

8.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Overall

8.0

Boarding

8.1

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 9h 49m. Delta provides one of the quickest options available for as low as $307. 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?

    Delta, at $286, was found to be the cheapest airline from Harrisburg to Seattle.Alternate airlines to your destination round-trip include American Airlines and United Airlines. These flights start at 41% 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, January is the cheapest month in which you can book a flight from Harrisburg to Seattle (average of $238). Flying from Harrisburg to Seattle in June is currently the most expensive (average of $387). 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
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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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 Tháng Chín 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$286Average$436FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$308Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$335Average$501FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$427Average$662FlexibilityNo cancel feeOn-time75%

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