ABE - SEA

$129 Find Cheap Flights from Allentown to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Allentown to Seattle departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Allentown to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Allentown to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$257
Typical prices: $457-$572
Delta
Fri 1/23Mon 1/26
ABE - SEA • 1 stop
Cheapest one-way
$129
Typical prices: $223-$339
United Airlines
Sat 1/17
ABE - SEA • 1 stop
Top airlines
Delta
Cheapest • from $257 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
October
Cheapest • 44% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Allentown to Seattle (ABE-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Allentown to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Allentown to Seattle

Fri, Jan 23 - Mon, Jan 26
Delta Logo
6:28 am - 12:20 pm
ABE
-
SEA
8h 52m1 stop
Delta Logo
10:59 pm - 12:05 pm
SEA
-
ABE
10h 06m1 stop
$257Delta
Fri, Jan 23 - Mon, Jan 26
United Airlines Logo
4:57 pm - 10:43 pm
ABE
-
SEA
8h 46m1 stop
United Airlines Logo
7:30 pm - 10:41 am
SEA
-
ABE
12h 11m2 stops
$262United Airlines
Fri, Jan 23 - Mon, Jan 26
United Airlines Logo
11:30 am - 9:12 pm
ABE
-
SEA
12h 42m2 stops
United Airlines Logo
7:30 pm - 10:41 am
SEA
-
ABE
12h 11m2 stops
$267United Airlines
Fri, Jan 23 - Sun, Jan 25
American Airlines Logo
1:02 pm - 11:51 pm
ABE
-
SEA
13h 49m2 stops
American Airlines Logo
11:12 pm - 12:32 pm
SEA
-
ABE
10h 20m2 stops
$307American Airlines
Wed, Jan 7 - Wed, Jan 14
American Airlines Logo
1:02 pm - 7:04 pm
ABE
-
SEA
9h 02m1 stop
American Airlines Logo
7:00 am - 10:26 pm
SEA
-
ABE
12h 26m2 stops
$342American Airlines
Fri, Jan 23 - Sun, Jan 25
Delta Logo
6:28 am - 12:20 pm
ABE
-
SEA
8h 52m1 stop
Delta Logo
10:59 pm - 12:05 pm
SEA
-
ABE
10h 06m1 stop
$358Delta
Tue, May 5 - Tue, May 12
United Airlines Logo
5:32 pm - 10:42 pm
ABE
-
SEA
8h 10m1 stop
United Airlines Logo
11:50 pm - 10:21 am
SEA
-
ABE
7h 31m1 stop
$409United Airlines
Wed, Jan 7 - Wed, Jan 14
United Airlines Logo
6:15 am - 11:32 am
ABE
-
SEA
8h 17m1 stop
United Airlines Logo
10:58 am - 9:05 pm
SEA
-
ABE
7h 07m1 stop
$416United Airlines
Wed, Jan 7 - Wed, Jan 14
United Airlines Logo
11:30 am - 9:15 pm
ABE
-
SEA
12h 45m2 stops
United Airlines Logo
7:30 pm - 10:41 am
SEA
-
ABE
12h 11m2 stops
$425United Airlines
Sat, Jan 31 - Wed, Feb 4
United Airlines Logo
11:30 am - 6:14 pm
ABE
-
SEA
9h 44m1 stop
United Airlines Logo
2:10 pm - 10:41 am
SEA
-
ABE
17h 31m1 stop
$446United Airlines
Booking Insights

KAYAK's insights & trends for Allentown to Seattle flights

Get data-powered insights and trends into flights from Allentown to Seattle to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Allentown to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Allentown to Seattle departing in January.

What’s the cheapest day of the week to fly from Allentown to Seattle?

The average price of all round-trip flights from Allentown to Seattle clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Seattle on a Wednesday and more expensive on a Monday. On your return trip to Allentown, you should consider flying back on a Sunday, and avoid Saturdays for better deals.

What is the cheapest month to fly from Allentown to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Allentown to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Allentown to Seattle is October, where tickets cost $294 (return) on average. On the other hand, the most expensive months are July and November, where the average cost of round-trip tickets is $790 and $683 respectively.

Find deals

Good to know

Low seasonNovember
Cheapest flight$129
Best time to beat the crowds but there is an average 29% increase in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from Allentown to Seattle

When to book flights from Allentown to Seattle

Are your dates flexible? Find out the best times to travel from Allentown to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Allentown to Seattle

  • What is the cheapest flight from Allentown to Seattle?

    In the last 3 days, the lowest price for a flight from Allentown to Seattle was $129 for a one-way ticket and $257 for a round-trip.

  • Do I need a passport to fly between Allentown and Seattle?

    A passport is not required to fly from Allentown to Seattle.

  • Which aircraft models fly most regularly from Allentown to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Allentown to Seattle?

    Star Alliance, and oneworld are the airline alliances operating flights between Allentown and Seattle, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Allentown to Seattle, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Allentown to Seattle are United Airlines and American Airlines. With an average price for the route of $623 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $469 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Allentown to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Allentown to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Allentown to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Allentown is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Allentown to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Allentown with another airline. Booking your flights between Allentown and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Allentown to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Allentown up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Allentown to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Allentown to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Allentown to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9095 reviews
8.1Crew
7.7Boarding
7.1Entertainment
6.6Food
7.3Comfort
Airline reviews

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

10.0 ExcellentMichele, Dec 2025
RSW - ORD
Read more United Airlines reviews

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

United have really come back. Airport and boarding process is clear and good, app and information also very good

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Flight team stood out for perzonal attention, kindness at bright cheery attitudes at 8am. Very helpful.

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Everything you need to know for your flight from Allentown to Seattle

Information on your arrival and departure airports

Allentown (ABE)
Seattle (SEA)