SEA - ABE

$313 Find Cheap Flights from Seattle to Allentown

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Allentown departing on 12/10. 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
$313
Delta
Wed 12/10Wed 12/17
SEA - ABE • 1 stop
Cheapest one-way
$639
Typical prices: $250-$267
Delta
Fri 11/21
SEA - ABE • 1 stop
Top airlines
Delta
Cheapest • from $313 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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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, Dec 10 - Wed, Dec 17
Delta Logo
6:00 am - 4:38 pmSEA-ABE
7h 38m1 stop
Delta Logo
5:23 pm - 11:58 pmABE-SEA
9h 35m1 stop
$313Delta
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Tue, Mar 10 - Wed, Mar 11
Delta Logo
6:00 am - 5:13 pmSEA-ABE
8h 13m1 stop
Delta Logo
6:30 am - 2:24 pmABE-SEA
10h 54m1 stop
$333Delta
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Tue, Mar 10 - Wed, Mar 11
Delta Logo
6:00 am - 5:13 pmSEA-ABE
8h 13m1 stop
Delta Logo
6:30 am - 12:29 pmABE-SEA
8h 59m1 stop
$362Delta
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Wed, Dec 10 - Wed, Dec 17
American Airlines Logo
8:30 am - 10:58 pmSEA-ABE
11h 28m2 stops
American Airlines Logo
1:48 pm - 8:37 pmABE-SEA
9h 49m1 stop
$382American Airlines
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Tue, Mar 10 - Wed, Mar 11
Delta Logo
6:00 am - 5:13 pmSEA-ABE
8h 13m1 stop
Delta Logo
6:30 am - 12:29 pmABE-SEA
8h 59m1 stop
$393Delta
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Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
7:29 pm - 9:59 amSEA-ABE
11h 30m2 stops
United Airlines Logo
5:32 pm - 10:32 pmABE-SEA
8h 00m1 stop
$412United Airlines
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Thu, Dec 11 - Sun, Dec 14
United Airlines Logo
1:40 pm - 11:52 amSEA-ABE
19h 12m1 stop
United Airlines Logo
6:30 am - 11:47 amABE-SEA
8h 17m1 stop
$451United Airlines
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Tue, Dec 9 - Wed, Dec 17
American Airlines Logo
12:31 am - 3:53 pmSEA-ABE
12h 22m2 stops
American Airlines Logo
1:48 pm - 8:37 pmABE-SEA
9h 49m1 stop
$452American Airlines
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Fri, Nov 28 - Sun, Nov 30
Multiple Airlines Logo
11:59 pm - 11:35 pmSEA-ABE
20h 36m3 stops
Multiple Airlines Logo
7:00 am - 5:09 pmABE-SEA
37h 09m3 stops
$1,479Multiple Airlines
Find Deal
Fri, Nov 28 - Sun, Nov 30
Multiple Airlines Logo
11:59 pm - 11:35 pmSEA-ABE
20h 36m3 stops
Multiple Airlines Logo
7:00 am - 10:46 pmABE-SEA
18h 46m2 stops
$1,493Multiple Airlines
Find Deal
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’s the cheapest day of the week to fly from Seattle to Allentown?

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

If you are looking for a flight deal from Seattle to Allentown, look for departures on Sundays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Allentown, Wednesday is the cheapest day to fly and Monday is the most expensive.

Good to know

Low seasonAugust
Cheapest flight$313
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 93% increase in price.
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 3 days, the lowest price for a flight from Seattle to Allentown was $639 for a one-way ticket and $313 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?

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Allentown are Delta and United Airlines. With an average price for the route of $647 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $534 and an overall rating of 7.4.

  • 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 3 airlines serving 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.
7.9
DeltaOverall score based on 8001 reviews
7.3Food
7.9Entertainment
7.9Comfort
8.5Crew
8.2Boarding
Airline reviews

I truly love flying with Delta. They have always treated me with the upmost respect

10.0 ExcellentMAYRA, Nov 2025JFK - MIA
Read more Delta reviews

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

Premium Plus is a really good idea for longer flights

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

the trip to madrid was uncomfortable with my legs touching the seat in front of me

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

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

Internet was a bit expensive and did not work ask that week otherwise a good flight

Dreadful experience. Our flight was delayed more than 8 hours due to a maintenance issue and the assistance from rebooking was poor. I was travelling with a bad knee and needed assistance waited in one place more than 3 hours before someone came with a wheelchair. The woman next to me was a 91 year old great grandmother who had waited more than 4 hours. There were moments of support from the staff but it appeared as they were going against the direction of management. It was apathy, lack of ownership and dismissive responses with small moments of kindness and understanding typically from grey haired, female, veteran staff..

The flight had a delay that made me being in a real rush to take the second flight. The delay was almost for 2 hours. They moved us from gate to gate in 4 times. Once I arrived to Philadelphia, I got to run thorough all the airport, as the train was already closed by that time. So I got sick with asthma for all the running I had to do. And I was the last one to board, when it was almost closed. So irresponsable with the people

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Overall, a good experience. The food, however, was subpar. The breakfast was a joke.

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

Information on your arrival and departure airports