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$140+ 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MDT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 26 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 June 12, 2025.

Round-trip from

$270
(American Airlines)

One-way from

$144
(American Airlines)

Popular in

March

Cheapest in

April

Average price

$416
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. 5% potential increase in price ($29 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 June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/9. 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 8/2512:45 amSEA - MDT
1 stop7h 18mAmerican Airlines
Mon 9/16:00 amMDT - SEA
1 stop8h 04mAmerican Airlines
Deal found 6/9$270
This Delta deal was found by Cheapflights users on 6/11. 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 9/1011:35 amSEA - MDT
1 stop7h 49mDelta
Tue 9/165:00 pmMDT - SEA
1 stop8h 25mDelta
Deal found 6/11$313
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/2111:20 pmSEA - MDT
1 stop7h 25mUnited Airlines
Sat 8/97:59 pmMDT - SEA
1 stop7h 57mUnited Airlines
Deal found 6/10$383
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 9/512:59 amSEA - MDT
1 stop7h 02mAlaska Airlines
Thu 9/184:57 pmMDT - SEA
1 stop8h 03mAlaska Airlines
Deal found 6/11$413
This Mytrip deal was found by Cheapflights users on 6/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/283:58 pmSEA - MDT
2 stops23h 05mMultiple Airlines
Mon 7/78:51 pmMDT - SEA
2 stops21h 12mMultiple Airlines
Deal found 6/9$535

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 June 12, 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

Mon 8/25

12:45 am-11:03 am

1 stop7h 18m

Harrisburg

Mon 9/1

6:00 am-11:04 am

1 stop8h 04m

$270

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Wed 9/10

11:35 am-10:24 pm

1 stop7h 49m

Harrisburg

Tue 9/16

5:00 pm-10:25 pm

1 stop8h 25m

$313

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Mon 7/21

11:20 pm-9:45 am

1 stop7h 25m

Harrisburg

Sat 8/9

7:59 pm-12:56 am

1 stop7h 57m

$383

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Fri 9/5

12:59 am-11:01 am

1 stop7h 02m

Harrisburg

Thu 9/18

4:57 pm-10:00 pm

1 stop8h 03m

$413

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Sat 6/28

3:58 pm-6:03 pm

2 stops23h 05m

Harrisburg

Mon 7/7

8:51 pm-3:03 pm

2 stops21h 12m

$535

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Sat 10/25

10:46 am-11:58 pm

1 stop10h 12m

$140

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Mon 7/14

11:45 pm-1:44 pm

2 stops10h 59m

$149

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Fri 10/24

12:17 am-10:57 am

1 stop7h 40m

$220

SeattleHarrisburg

SEA - MDT

SEAMDT

Seattle/Tacoma Intl

Sun 7/13

5:30 pm-8:01 pm

3 stops23h 31m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 9, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Harrisburg, you should look to book at least 26 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 July is currently the most expensive (average of $425). 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.

What is the cheapest time of day to fly from SEA to MDT?

Find hourly flight availability from Seattle to Harrisburg. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Seattle to Harrisburg, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 30% versus a flight in the morning.

Rainfall in Harrisburg by month

Plan your trip to Harrisburg by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Harrisburg ranges from 2.7 - 4.1 inches per month. May is typically the wettest month, when rainfall can reach 4.1 in. February is typically the driest time to visit Harrisburg when rainfall is around 2.7 in.

Temperature in Harrisburg by month

Plan your trip to Harrisburg by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Harrisburg, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 June 12, 2025.
To help decide which airline to fly from Seattle to Harrisburg, see what other customers have to say about Alaska Airlines, Delta and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

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 $270, 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 $313 and $383, respectively. American Airlines is priced at 48% 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 July is currently the most expensive (average of $425). 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
Carlisle
Hershey
Mechanicsburg
Camp Hill

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Alternative routes for Seattle to Harrisburg

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$226Average$437FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$280Average$446FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$286Average$591FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$410Average$638FlexibilityNo cancel feeOn-time75%

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