SEA - ABE

$175 Find Cheap Flights from Seattle to Allentown - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Allentown departing on 7/23. 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 Allentown

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

Cheapest round-trip
$349
Typical prices: $475-$751
Delta
Wed 8/26Wed 9/2
SEA - ABE • 1 stop
Cheapest one-way
$175
Overall average: $538
United Airlines
Thu 7/23
SEA - ABE • 1 stop
Top airlines
Cheapest • from $349 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Seattle and Allentown. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $429 (round-trip)
Shortest trip • 7h 46m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
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 Allentown!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Allentown (SEA-ABE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Allentown 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 Seattle to Allentown

Wed, Aug 26 - Wed, Sep 2
Delta Logo
6:00 am - 5:23 pm
SEA
-
ABE
8h 23m
1 stop
Delta Logo
6:09 pm - 11:57 pm
ABE
-
SEA
8h 48m
1 stop
$349Delta
Thu, Aug 20 - Wed, Sep 2
United Airlines Logo
11:00 pm - 9:57 am
SEA
-
ABE
7h 57m
1 stop
United Airlines Logo
5:36 pm - 10:43 pm
ABE
-
SEA
8h 07m
1 stop
$359United Airlines
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
7:00 am - 3:08 pm
SEA
-
ABE
29h 08m
1 stop
Multiple Airlines Logo
7:30 am - 12:27 am
ABE
-
SEA
19h 57m
1 stop
$360Multiple Airlines
Sun, Nov 1 - Wed, Nov 11
Delta Logo
11:35 pm - 12:04 pm
SEA
-
ABE
9h 29m
1 stop
Delta Logo
1:00 pm - 6:59 pm
ABE
-
SEA
8h 59m
1 stop
$384Delta
Sun, Nov 1 - Wed, Nov 11
Delta Logo
11:35 pm - 12:04 pm
SEA
-
ABE
9h 29m
1 stop
Delta Logo
1:00 pm - 6:59 pm
ABE
-
SEA
8h 59m
1 stop
$385Delta
Sun, Nov 1 - Wed, Nov 11
Delta Logo
11:35 pm - 12:04 pm
SEA
-
ABE
9h 29m
1 stop
Delta Logo
1:00 pm - 11:59 pm
ABE
-
SEA
13h 59m
2 stops
$389Delta
Sun, Nov 1 - Wed, Nov 11
Delta Logo
11:35 pm - 12:04 pm
SEA
-
ABE
9h 29m
1 stop
Delta Logo
1:00 pm - 11:59 pm
ABE
-
SEA
13h 59m
2 stops
$390Delta
Wed, Aug 19 - Mon, Aug 31
Multiple Airlines Logo
7:06 pm - 9:07 pm
SEA
-
ABE
23h 01m
2 stops
Multiple Airlines Logo
7:30 am - 9:19 am
ABE
-
SEA
28h 49m
1 stop
$399Multiple Airlines
Thu, Aug 20 - Wed, Sep 2
United Airlines Logo
11:00 pm - 9:57 am
SEA
-
ABE
7h 57m
1 stop
United Airlines Logo
10:32 am - 9:15 pm
ABE
-
SEA
13h 43m
2 stops
$400United Airlines
Wed, Jul 29 - Mon, Aug 10
American Airlines Logo
6:00 am - 4:42 pm
SEA
-
ABE
7h 42m
1 stop
American Airlines Logo
5:12 pm - 11:59 pm
ABE
-
SEA
9h 47m
1 stop
$402American Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Allentown flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Allentown, 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 Seattle to Allentown is March, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and February, where the average cost of round-trip tickets is $759 and $734 respectively.

Good to know

Cheapest flight$175
Most popular time to fly and prices are also 23% lower on average.
Flight from Seattle to Allentown

When to book flights from Seattle to Allentown

Are your dates flexible? Find out the best times to travel from Seattle to Allentown 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 Seattle to Allentown

  • What is the cheapest flight from Seattle to Allentown?

    In the last 5 days, the lowest price for a flight from Seattle to Allentown was $175 for a one-way ticket and $349 for a round-trip.

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

    No

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

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

  • Which airline alliances offer flights from Seattle to Allentown?

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Allentown are United Airlines and American Airlines. With an average price for the route of $443 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 $478 and an overall rating of 7.1.

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

    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 Seattle to Allentown.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Allentown from Seattle 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 Seattle to Allentown?

    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 Allentown with an airline and back to Seattle with another airline. Booking your flights between Seattle and ABE 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 Seattle to Allentown?

    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 Allentown from Seattle 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 Seattle to Allentown

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Allentown. 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 Seattle to Allentown? 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 9875 reviews
8.1Crew
7.1Entertainment
7.7Boarding
6.6Food
7.3Comfort
Airline reviews

Lost one piece of luggage even though I checked in 2.5 hours before the flight

6.0 Goodmerrill, Jun 2026
SFO - MCO
Read more United Airlines reviews

Lost one piece of luggage even though I checked in 2.5 hours before the flight

For the expense of first class, the seats could have been nicer and higher tier snacks would have been nice.

The boarding process on the departure from LA was rather slow even though I was in Group 1. For first class, I was not expecting to have to pay for Wi-fi but I did and then the wi-fi was spotty. The entree was surprisingly good and so that was a pleasant surprise. However, once I got to Houston, it was terrible. Unfortunately there was bad weather but the constant gate changes for my connecting flight was difficult to manage due to having to navigate back and forth between different terminals.

They delayed the flight 3 hours because it wasn't full they moved us to 5 different gates probably the worst airline ever not even spirit is this bad.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Airline tickets are not cheap. You expect reliable competent service. Thanks to canceled flights and botched transfers we arrived at our destination two days late. This is not acceptable

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

The seats. The seat in front of me was awful and when the guy sat down, it flew back and hit my head when I was putting my backpack under the seat, It didn't make for a pleasant experience,

Cancelled flight. Still waiting to get home for grand daughter’s graduation .

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

As we approached Denver, we encountered quite a bit of turbulence. I know this can sometimes be the case as I frequently fly this route but not on American. My gripe: Usually a pilot or co-pilot alerts passengers to the possibility of turbulance ahead of time. This did not occur nor did he communiucate during what was a pretty rough ride.

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

When I booked my flight a month ago - I selected a seat. That seat was NOT the one I ended up with when I checked into my flight the day before. This is the second time this has occurred. So, I checked my next flight on Wednesday and Thursday and no seat was assigned. Poor, very poor customer service.

Cleared standby and gave up my seat. Terrible policy and boarding experience

Message about flight cancelation was received late due to being in the air. No explanation, just canceled and booked on morning flight. We had to stay in the airport overnight because there was no transportation offered to get to the hotel that AA had available. Actual inflight was fine.

Bag drop was very disorganized in Miami. All main cabin passengers were shunted to just a few lanes and they had an equal number of lanes for first class passengers but there was nobody on those lines. They did nothing to bring the main cab and passengers over to the open lines and they just had employees standing there and doing nothing

We did not have enough time to make our connecting flight. As a result, we were put onto a different airline for our second leg. The different airline was NOT comparable to British Airlines, and our arrival was significantly delayed. The actual flight on BA was amazing.

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

Information on your arrival and departure airports