HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Allentown

$149+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ABE
Mar 22 — Mar 291
Sun 3/22
Sun 3/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Allentown with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 February 20, 2026.

This United Airlines deal was found by Cheapflights users on 2/19. 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 11/135:30 pm
SEA
-
ABE
2 stops13h 36m
United Airlines
Tue 11/175:36 pm
ABE
-
SEA
1 stop7h 53m
United Airlines
Deal found 2/19$334
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/710:55 am
SEA
-
ABE
1 stop6h 55m
United Airlines
Wed 3/116:20 am
ABE
-
SEA
2 stops12h 54m
United Airlines
Deal found 2/19$444
This United Airlines deal was found by Cheapflights users on 2/18. 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.
Fri 3/2711:59 pm
SEA
-
ABE
1 stop6h 57m
United Airlines
Sun 3/295:38 pm
ABE
-
SEA
1 stop7h 59m
United Airlines
Deal found 2/18$457
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Fri 11/1311:42 am
SEA
-
ABE
1 stop7h 33m
American Airlines
Tue 11/172:00 pm
ABE
-
SEA
1 stop9h 59m
American Airlines
Deal found 2/19$467
This United Airlines deal was found by Cheapflights users on 2/16. 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 3/311:59 pm
SEA
-
ABE
1 stop7h 02m
United Airlines
Sat 3/76:20 am
ABE
-
SEA
1 stop8h 29m
United Airlines
Deal found 2/16$479
This United Airlines deal was found by Cheapflights users on 2/16. 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 3/1011:59 pm
SEA
-
ABE
1 stop6h 57m
United Airlines
Fri 4/105:38 pm
ABE
-
SEA
1 stop9h 41m
United Airlines
Deal found 2/16$519

Find 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 February 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$444
(United Airlines)

One-way from

$149
(United Airlines)

Popular in

March

Cheapest in

April

Average price

$558
Provider with most accurate pricing for Seattle/Tacoma Intl-Allentown-Bethlehem flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Allentown-Bethlehem flights.
Search Deals
From Seattle/Tacoma Intl to Allentown-Bethlehem
Search Deals
One-way flight from Seattle/Tacoma Intl to Allentown-Bethlehem
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 20, 2026.
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

Fri 3/27

11:59 pm-9:56 am

1 stop6h 57m

Allentown-Bethlehem

Sun 3/29

5:38 pm-10:37 pm

1 stop7h 59m

$457

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Sat 3/7

5:00 am-8:50 pm

2 stops12h 50m

Allentown-Bethlehem

Wed 3/11

6:20 am-4:14 pm

2 stops12h 54m

$458

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Tue 3/3

11:59 pm-10:01 am

1 stop7h 02m

Allentown-Bethlehem

Sat 3/7

6:20 am-11:49 am

1 stop8h 29m

$479

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Tue 3/10

11:59 pm-9:56 am

1 stop6h 57m

Allentown-Bethlehem

Fri 4/10

5:38 pm-12:19 am

1 stop9h 41m

$519

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Thu 4/9

6:15 am-5:17 pm

1 stop8h 02m

Allentown-Bethlehem

Mon 4/13

5:59 pm-11:53 pm

1 stop8h 54m

$528

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Fri 4/17

11:15 pm-12:12 pm

1 stop9h 57m

Allentown-Bethlehem

Sun 4/19

5:59 pm-11:53 pm

1 stop8h 54m

$528

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Thu 3/5

11:59 pm-9:56 am

1 stop6h 57m

Allentown-Bethlehem

Mon 3/9

6:51 pm-7:03 pm

1 stop27h 12m

$591

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Fri 3/20

11:59 pm-9:56 am

1 stop6h 57m

Allentown-Bethlehem

Fri 3/27

10:31 am-7:03 pm

1 stop11h 32m

$676

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Sat 4/18

7:00 am-5:05 pm

1 stop7h 05m

$149

SeattleAllentown

SEA - ABE

SEAABE

Seattle/Tacoma Intl

Tue 4/21

7:12 pm-8:32 am

2 stops34h 20m

$192

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 17 results
1
2

Compare providers for flights from Seattle to Allentown

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 Allentown in February.
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-Allentown flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Allentown flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Allentown flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Allentown 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-Allentown 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 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, October is the cheapest month in which you can book a flight from Seattle to Allentown (average of $177). Flying from Seattle to Allentown in July is currently the most expensive (average of $274). 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 Allentown?

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 February 20, 2026.
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
7.9
Good
8,215 reviews

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,215 reviews
Delta
7.9
Good
8,215 reviews

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,325 reviews
Delta
7.9
Good
8,215 reviews

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,320 reviews
Delta
7.9
Good
8,215 reviews

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 6h 57m. Seattle and Allentown are separated by a distance of 2336 mi.

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

    Currently priced at $292, United Airlines will fly you from Seattle to Allentown and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $297 and $308, respectively. These flights start at 45% 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, October is the cheapest month in which you can book a flight from Seattle to Allentown (average of $177). Flying from Seattle to Allentown in July is currently the most expensive (average of $274). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 February 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$292Average$443FlexibilityNo cancel feeOn-time69%
DeltaCheapest$297Average$644FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$308Average$506FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.