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$144+ Cheap flights from Seattle to Harrisburg (SEA - MDT)

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MDT
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Harrisburg are usually found in April or February, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to Harrisburg

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Harrisburg (MDT). 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 July 30, 2025.

Round-trip from

$284
(American Airlines)

One-way from

$144
(American Airlines)

Popular in

March

Cheapest in

April

Average price

$453
From Seattle/Tacoma Intl to Harrisburg
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One-way flight from Seattle/Tacoma Intl to Harrisburg
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Highest demand for flights based on searches. 4% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Seattle to Harrisburg

Cheapest flights from Seattle to Harrisburg
Explore the most affordable flight options available from Seattle to Harrisburg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/29. 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 10/111:40 amSEA - MDT
1 stop8h 32mAmerican Airlines
Sun 10/56:30 amMDT - SEA
1 stop8h 30mAmerican Airlines
Deal found 7/29$286
This Delta deal was found by Cheapflights users on 7/29. 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 9/411:15 pmSEA - MDT
1 stop9h 37mDelta
Sun 9/76:42 pmMDT - SEA
1 stop8h 17mDelta
Deal found 7/29$309
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 9/1511:54 pmSEA - MDT
2 stops10h 54mUnited Airlines
Wed 9/175:48 pmMDT - SEA
1 stop7h 32mUnited Airlines
Deal found 7/29$317
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1412:59 amSEA - MDT
1 stop7h 02mAlaska Airlines
Wed 9/176:00 amMDT - SEA
1 stop7h 37mAlaska Airlines
Deal found 7/29$459

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Harrisburg 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 July 30, 2025.
Use the filters below to find and compare flights from Seattle to Harrisburg that are best for you.

Fly from

Seattle

Fly to

Harrisburg

Route

Depart

Return

Price

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Wed 10/1

10:09 am-11:12 pm

1 stop10h 03m

Harrisburg

Sun 10/5

6:23 am-2:50 pm

1 stop11h 27m

$284

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Thu 9/4

11:15 pm-11:52 am

1 stop9h 37m

Harrisburg

Sun 9/7

6:42 pm-11:59 pm

1 stop8h 17m

$309

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Mon 9/15

11:54 pm-1:48 pm

2 stops10h 54m

Harrisburg

Wed 9/17

5:48 pm-10:20 pm

1 stop7h 32m

$317

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Sun 9/14

12:59 am-11:01 am

1 stop7h 02m

Harrisburg

Thu 9/18

4:55 pm-10:00 pm

1 stop8h 05m

$423

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Fri 9/5

11:05 pm-11:50 am

1 stop9h 45m

$144

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Fri 9/5

11:54 pm-1:48 pm

2 stops10h 54m

$149

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Mon 9/29

12:59 am-11:01 am

1 stop7h 02m

$194

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Thu 8/14

11:59 pm-8:32 pm

2 stops17h 33m

$251

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Tue 8/12

7:45 pm-10:54 am

2 stops12h 09m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Best time to book a flight from Seattle to Harrisburg

Have a flexible travel schedule? Discover the best time to fly to Harrisburg from Seattle 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 Seattle to Harrisburg

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Harrisburg. Price data was last updated on July 25, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Harrisburg, you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Harrisburg (average of $355). Flying from Seattle to Harrisburg in November is currently the most expensive (average of $408). 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 Harrisburg

Get insights into the airlines that provide service to Harrisburg. 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 Harrisburg. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Seattle to Harrisburg, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

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

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

    Currently priced at $284, American Airlines will fly you from Seattle to Harrisburg and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $309 and $317, respectively. American Airlines is priced at 46% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Harrisburg one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $144. However, be on the lookout for offers from United Airlines and Alaska Airlines, as they are both options that can get you from Seattle to Harrisburg for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Harrisburg 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 Seattle to Harrisburg?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Harrisburg (average of $355). Flying from Seattle to Harrisburg in November is currently the most expensive (average of $408). 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 Harrisburg?

Book flights to Harrisburg if you plan to visit one of these locations
Carlisle
Hershey
Mechanicsburg
Camp Hill

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Top 4 airlines flying from Seattle to Harrisburg

Discover the top 4 airlines that operate flights from Seattle to Harrisburg. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$226Average$453FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$593FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$286Average$455FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$539Average$638FlexibilityNo cancel feeOn-time75%

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