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$170+ Cheap flights from Seattle to Allentown (SEA - ABE)

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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ABE
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Seattle to Allentown

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Allentown (ABE). 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 August 18, 2025.

Round-trip from

$332
(Kiwi.com)

One-way from

$170
(Delta)

Popular in

December

Cheapest in

August

Average price

$492
From Seattle/Tacoma Intl to Allentown-Bethlehem
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One-way flight from Seattle/Tacoma Intl to Allentown-Bethlehem
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Highest demand for flights based on searches. 40% potential increase in price ($462 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Seattle to Allentown

Cheapest flights from Seattle to Allentown
Explore the most affordable flight options available from Seattle to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:00 amSEA - ABE
1 stop30h 05mMultiple Airlines
Sat 9/203:51 pmABE - SEA
2 stops35h 39mMultiple Airlines
Deal found 8/16$332
This American Airlines deal was found by Cheapflights users on 8/17. 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.
Wed 9/36:42 amSEA - ABE
1 stop8h 48mAmerican Airlines
Tue 9/92:37 pmABE - SEA
1 stop10h 52mAmerican Airlines
Deal found 8/17$338
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Tue 9/211:54 pmSEA - ABE
1 stop9h 04mUnited Airlines
Tue 9/95:28 pmABE - SEA
1 stop7h 52mUnited Airlines
Deal found 8/16$339
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:41 amSEA - ABE
1 stop30h 24mMultiple Airlines
Mon 9/88:30 amABE - SEA
2 stops19h 00mMultiple Airlines
Deal found 8/16$347
This American Airlines deal was found by Cheapflights users on 8/17. 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.
Thu 10/307:44 amSEA - ABE
2 stops10h 56mAmerican Airlines
Sat 11/16:13 amABE - SEA
1 stop9h 38mAmerican Airlines
Deal found 8/17$378
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Tue 9/211:54 pmSEA - ABE
1 stop9h 04mUnited Airlines
Mon 9/85:28 pmABE - SEA
1 stop7h 52mUnited Airlines
Deal found 8/16$396
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/254:36 pmSEA - ABE
2 stops18h 34mMultiple Airlines
Sun 9/288:00 amABE - SEA
1 stop19h 30mMultiple Airlines
Deal found 8/18$397
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Fri 9/125:35 pmSEA - ABE
2 stops14h 02mUnited Airlines
Sat 9/135:28 pmABE - SEA
1 stop7h 52mUnited Airlines
Deal found 8/16$414
This United Airlines deal was found by Cheapflights users on 8/18. 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 8/267:34 pmSEA - ABE
2 stops13h 24mUnited Airlines
Mon 9/16:37 amABE - SEA
1 stop7h 54mUnited Airlines
Deal found 8/18$419

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Allentown 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 August 18, 2025.
Use the filters below to find and compare flights from Seattle to Allentown that are best for you.

Fly from

Seattle

Fly to

Allentown

Route

Depart

Return

Price

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Sat 9/13

7:00 am-4:05 pm

1 stop30h 05m

Allentown-Bethlehem

Sat 9/20

3:51 pm-12:30 am

2 stops35h 39m

$332

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Wed 9/3

6:42 am-6:30 pm

1 stop8h 48m

Allentown-Bethlehem

Tue 9/9

2:37 pm-10:29 pm

1 stop10h 52m

$338

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Wed 10/29

7:44 am-9:40 pm

2 stops10h 56m

Allentown-Bethlehem

Sun 11/2

2:00 pm-8:59 pm

1 stop9h 59m

$338

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Tue 9/2

11:54 pm-11:58 am

1 stop9h 04m

Allentown-Bethlehem

Tue 9/9

5:28 pm-10:20 pm

1 stop7h 52m

$339

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Wed 9/3

6:41 am-4:05 pm

1 stop30h 24m

Allentown-Bethlehem

Mon 9/8

8:30 am-12:30 am

2 stops19h 00m

$347

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Thu 10/30

7:44 am-9:40 pm

2 stops10h 56m

Allentown-Bethlehem

Sat 11/1

6:13 am-12:51 pm

1 stop9h 38m

$378

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Wed 12/24

11:55 am-11:14 pm

1 stop8h 19m

$170

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Mon 9/15

11:54 pm-11:58 am

1 stop9h 04m

$199

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Thu 12/25

11:55 am-11:14 pm

1 stop8h 19m

$224

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Thu 12/25

10:57 am-9:47 pm

1 stop7h 50m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 13 results
1
2

Best time to book a flight from Seattle to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown 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 Allentown

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Allentown (average of $289). Flying from Seattle to Allentown in December is currently the most expensive (average of $395). 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 ABE?

Find hourly flight availability from Seattle to Allentown. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

When flying from Seattle to Allentown, 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 25% versus a flight in the morning.

Reviews of airlines servicing Allentown

Get insights into the airlines that provide service to Allentown. 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 Allentown. Reviews last updated August 18, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Seattle to Allentown. 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.
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Allentown. 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 Allentown?

    Departing from Seattle to Allentown will take you 8h 48m. Seattle and Allentown are separated by a distance of 2336 mi. This flight may include one or multiple stops.

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

    Currently priced at $297, Delta will fly you from Seattle to Allentown and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and United Airlines - these airlines can fly you to your destination from $372 and $383, respectively. These flights start at 56% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Seattle to Allentown (average of $289). Flying from Seattle to Allentown in December is currently the most expensive (average of $395). 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

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Other flights to Allentown

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Top 3 airlines flying from Seattle to Allentown

Discover the top 3 airlines that operate flights from Seattle to Allentown. 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$297Average$647FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$372Average$552FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$383Average$608FlexibilityNo cancel feeOn-time69%

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