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$149+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MDT
May 29 — Jun 51
Fri 5/29
Fri 6/5
1 adult, Economy
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Cheap 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 April 29, 2026.

This American Airlines deal was found by Cheapflights users on 4/26. 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.
Tue 7/76:00 am
SEA
-
MDT
1 stop7h 20m
American Airlines
Tue 7/147:45 pm
MDT
-
SEA
1 stop8h 07m
American Airlines
Deal found 4/26$261
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 5/2610:35 pm
SEA
-
MDT
1 stop8h 33m
American Airlines
Tue 6/25:46 pm
MDT
-
SEA
1 stop9h 30m
American Airlines
Deal found 4/28$279
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 8/1811:59 pm
SEA
-
MDT
1 stop9h 43m
American Airlines
Tue 9/82:45 pm
MDT
-
SEA
1 stop10h 14m
American Airlines
Deal found 4/28$306
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Tue 8/1810:47 pm
SEA
-
MDT
1 stop7h 44m
United Airlines
Tue 8/255:53 pm
MDT
-
SEA
1 stop7h 49m
United Airlines
Deal found 4/25$344
This American Airlines deal was found by Cheapflights users on 4/24. 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 8/2612:34 am
SEA
-
MDT
1 stop7h 42m
American Airlines
Tue 9/12:45 pm
MDT
-
SEA
1 stop10h 14m
American Airlines
Deal found 4/24$355
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Tue 5/2612:09 am
SEA
-
MDT
1 stop7h 58m
Alaska Airlines
Sat 5/302:20 pm
MDT
-
SEA
1 stop11h 08m
Alaska Airlines
Deal found 4/26$371
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Tue 5/191:07 pm
SEA
-
MDT
1 stop7h 21m
United Airlines
Mon 5/256:15 am
MDT
-
SEA
1 stop8h 36m
United Airlines
Deal found 4/27$373
This American Airlines deal was found by Cheapflights users on 4/25. 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 4/251:19 pm
SEA
-
MDT
1 stop7h 33m
American Airlines
Sat 5/26:40 am
MDT
-
SEA
1 stop7h 54m
American Airlines
Deal found 4/25$387
This United Airlines deal was found by Cheapflights users on 4/24. 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 8/277:00 am
SEA
-
MDT
1 stop6h 51m
United Airlines
Tue 9/12:53 pm
MDT
-
SEA
2 stops11h 18m
United Airlines
Deal found 4/24$389
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/25:05 am
SEA
-
MDT
2 stops10h 40m
United Airlines
Tue 5/55:54 pm
MDT
-
SEA
1 stop7h 53m
United Airlines
Deal found 4/28$392
This Expedia deal was found by Cheapflights users on 4/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:26 am
SEA
-
MDT
2 stops14h 33m
Alaska Airlines
Tue 6/211:39 am
MDT
-
SEA
2 stops12h 51m
Alaska Airlines
Deal found 4/28$399

Find 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 April 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$261
(American Airlines)

One-way from

$149
(United Airlines)

Popular in

December

Cheapest in

November

Average price

$398
Provider with most accurate pricing for Seattle/Tacoma Intl-Harrisburg flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Harrisburg flights.
Search Deals
From Seattle/Tacoma Intl to Harrisburg
Search Deals
One-way flight from Seattle/Tacoma Intl to Harrisburg
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 29, 2026.
Use the filters below to find and compare flights from Seattle to Harrisburg that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Tue 8/18

10:47 pm-9:31 am

1 stop7h 44m

Harrisburg

Tue 8/25

5:53 pm-10:42 pm

1 stop7h 49m

$344

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Tue 5/26

12:09 am-11:07 am

1 stop7h 58m

Harrisburg

Sat 5/30

2:20 pm-10:28 pm

1 stop11h 08m

$371

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Wed 10/21

7:28 pm-9:55 am

2 stops11h 27m

Harrisburg

Wed 10/28

2:30 pm-8:10 pm

1 stop8h 40m

$376

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Thu 6/25

10:40 pm-9:36 am

1 stop7h 56m

Harrisburg

Tue 6/30

6:15 am-11:51 am

1 stop8h 36m

$447

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Sat 5/9

9:44 pm-9:32 am

1 stop8h 48m

Harrisburg

Wed 5/13

4:36 pm-10:30 pm

1 stop8h 54m

$457

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Wed 5/27

7:00 am-11:30 pm

2 stops13h 30m

Harrisburg

Sat 5/30

8:00 am-8:53 pm

2 stops15h 53m

$475
Cheapest one-way

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Tue 6/9

5:30 am-4:54 pm

1 stop8h 24m

$180

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Tue 6/16

11:25 am-11:10 pm

1 stop8h 45m

$180

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Mon 6/8

6:00 am-5:37 pm

1 stop8h 37m

$180
Quickest one-way

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Tue 5/19

12:30 pm-10:50 pm

1 stop7h 20m

$200

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Harrisburg

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 Seattle to Harrisburg in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 Seattle-Harrisburg flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Harrisburg flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Harrisburg flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Harrisburg 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 Seattle-Harrisburg 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 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

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

Currently, November is the cheapest month in which you can book a flight from Seattle to Harrisburg (average of $367). Flying from Seattle to Harrisburg in December is currently the most expensive (average of $596). 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 Seattle to Harrisburg?

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 April 29, 2026.
Read through reviews of airlines operating flights from Seattle to Harrisburg, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,313 reviews

Overall

7.9

Crew

8.5

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
7.9
Good
12,313 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Overall

7.9

Crew

8.5

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,465 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Overall

7.9

Crew

8.5

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,680 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Overall

7.9

Crew

8.5

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.1
Good
11,678 reviews
Alaska Airlines
7.9
Good
12,313 reviews

Overall

7.9

Crew

8.5

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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.

  • How long is the flight from Seattle to Harrisburg?

    A quick flight from Seattle to Harrisburg can take about 7h 44m. United Airlines provides one of the quickest options available for as low as $344. There are 2289 mi between Seattle and Harrisburg. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $189, Delta will fly you from Seattle to Harrisburg and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $193 and $277, respectively. Delta is priced at 59% 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 United Airlines, with whom users have recently found tickets for as low as $139. However, be on the lookout for offers from American 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, November is the cheapest month in which you can book a flight from Seattle to Harrisburg (average of $367). Flying from Seattle to Harrisburg in December is currently the most expensive (average of $596). 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
Mechanicsburg
Hershey
Camp Hill
Carlisle

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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 April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$189Average$419FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$193Average$498FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$277Average$453FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$412Average$638FlexibilityNo cancel feeOn-time75%

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