SEA - ABE

$149 Find Cheap Flights from Seattle to Allentown

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 4/15. 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
$389
Overall average: $558
United Airlines
Sat 2/28Wed 3/4
SEA - ABE • 1 stop
Cheapest one-way
$149
Typical prices: $392-$423
United Airlines
Wed 4/15
SEA - ABE • 1 stop
Top airlines
United Airlines
Cheapest • from $389 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
April
Cheapest • 41% price drop
January
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

Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
11:59 pm - 10:01 am
SEA
-
ABE
7h 02m
1 stop
United Airlines Logo
6:28 am - 11:49 am
ABE
-
SEA
8h 21m
1 stop
$389United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
11:59 pm - 10:01 am
SEA
-
ABE
7h 02m
1 stop
United Airlines Logo
10:36 am - 11:30 pm
ABE
-
SEA
15h 54m
2 stops
$394United Airlines
Tue, Mar 3 - Thu, Mar 5
American Airlines Logo
12:27 pm - 11:31 pm
SEA
-
ABE
8h 04m
1 stop
American Airlines Logo
12:00 pm - 7:14 pm
ABE
-
SEA
10h 14m
1 stop
$437American Airlines
Thu, Mar 12 - Thu, Mar 19
American Airlines Logo
10:08 pm - 11:30 am
SEA
-
ABE
10h 22m
1 stop
American Airlines Logo
6:04 am - 12:51 pm
ABE
-
SEA
9h 47m
1 stop
$467American Airlines
Tue, Mar 3 - Thu, Mar 5
American Airlines Logo
12:27 pm - 11:31 pm
SEA
-
ABE
8h 04m
1 stop
American Airlines Logo
12:00 pm - 7:14 pm
ABE
-
SEA
10h 14m
1 stop
$487American Airlines
Wed, Mar 25 - Sat, Mar 28
United Airlines Logo
11:59 pm - 9:56 am
SEA
-
ABE
6h 57m
1 stop
United Airlines Logo
10:31 am - 8:58 pm
ABE
-
SEA
13h 27m
2 stops
$516United Airlines
Wed, Mar 25 - Sat, Mar 28
United Airlines Logo
11:59 pm - 9:56 am
SEA
-
ABE
6h 57m
1 stop
United Airlines Logo
6:20 am - 11:49 am
ABE
-
SEA
8h 29m
1 stop
$528United Airlines
Tue, Mar 3 - Thu, Mar 5
American Airlines Logo
12:27 pm - 11:31 pm
SEA
-
ABE
8h 04m
1 stop
American Airlines Logo
12:00 pm - 9:17 pm
ABE
-
SEA
12h 17m
2 stops
$567American Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
11:59 pm - 10:01 am
SEA
-
ABE
7h 02m
1 stop
United Airlines Logo
5:23 pm - 10:43 pm
ABE
-
SEA
8h 20m
1 stop
$569United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
5:00 am - 4:48 pm
SEA
-
ABE
8h 48m
2 stops
United Airlines Logo
6:28 am - 3:41 pm
ABE
-
SEA
12h 13m
2 stops
$579United 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 April, where tickets cost $316 (return) on average. On the other hand, the most expensive months are March and May, where the average cost of round-trip tickets is $769 and $723 respectively.

Good to know

Low seasonMarch
Cheapest flight$149
Best time to beat the crowds but there is an average 43% increase in price.
Most popular time to fly and prices are also 18% 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 3 days, the lowest price for a flight from Seattle to Allentown was $149 for a one-way ticket and $389 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, oneworld, and Star Alliance 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 $644 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 $443 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 8203 reviews
7.8Entertainment
7.2Food
7.9Comfort
8.5Crew
8.1Boarding
Airline reviews

Totally worth the miles to upgrade to Delta Comfort. Plenty of legroom.

10.0 ExcellentSharon, Feb 2026
TPA - ATL
Read more Delta reviews

Totally worth the miles to upgrade to Delta Comfort. Plenty of legroom.

This was my first time flying Delta ever and I had a great experience!

Smallest leg room I've ever had on a plane.

They took all carry-on luggage from Groups 6 -9 - I was group 5 and waiting in line to board - they made me check my luggage too. That then went to baggage claim and delayed departure from the airport. There was overhead room in my seating area - Delta over reacted. Also, had a gentleman next to me that took up 1/2 my seat.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

The gate agent was most helpful in getting me on to fly standby. I greatly appreciate it.

bulkhead seat had very little legroom - even in bsiness class.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Sorry I didn't realize I was writing a review for each leg. Please see my previous review - it applies to the entire flight, not just a single leg.

This is the first time I've been disappointed with Delta. I was called by Delta to see if I would volunteer to change flights since my original flight home was overbooked. I accepted. The modified booking only provided me a 35 minute layover - when you subtract the fact that boarding closes for a flight 15 minutes early, that gave me 20 minutes to run for one end of the airport to the other. I barely made it. On the 2.5 hour flight to Tampa, the crew repeatedly let us know over the intercom that they cannot serve drinks or snacks due to safety/turbulence. I would have accepted this reason if they did not CONTINUALLY SERVE DRINKS AND COOKED FOOD to First class. If safety is the excuse then the entire plane should be strapped in for safety. On top of this the air conditioning vents were not working correctly and the plane was uncomfortably warm. I love Delta and am a loyal Delta traveler, and I have never had an experience like this. I don't know if there's a disconnect between availability among third-party sites like KAYAK and the airlines or what, but when overbooking causes issues like this for travelers it should be reviewed and changes to the booking process should be made. I blame BOTH KAYAK and Delta for this terrible experience.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Everything was on time Will use united again for sure

Plane outlets in my row not working to charge phone. Staff response was, well it should be. Plug into seed for volume not working well. Had to find the sweet spot for plug in or it would shut off and on.

I was on a small regional flight from Detroit to Philadelphia. When we landed the outside cruise needed to turn something off with the engine, which took quite a long time. Then, when they allowed us to get off the plane it was outside. They took their time, unloading all the luggage and waited till they unloaded all the luggage before they brought it over to us. It was 9 o’clock at night freezing cold out, and there was no proactive hustle to try to get people their luggage. It was really one of the worst experiences I think I’ve ever had with American until a manager came over. I don’t think they were going to even consider pulling the luggage over to the people that had been waiting outside for at least 10 minutes in the freezing cold.

Awful. Original flight was delayed 5 hours. Had to to take a connecting flight instead of direct. Had a 4 hour layover. I missed all of my morning meetings getting in 5 hours later than I was supposed to and had to change to take a later flight the next day to get them back in which cia time another $150.

I was trying to take 2 one and a half hour one way trips and I experienced almost 20 delays over the course of those two trips. Only a few of them were due to weather the rest was disorganization

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

The seat cushions were very worn so they were extremely uncomfortable.

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

Crew were all friendly and helpful. It was a short flight so just a beverage service with a cookie. After we were boarded the plane took about 45 minutes to leave the gate but it was New Year’s Eve so not shocking there was some delay. Overall good experience and very grateful.

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

Flight was on time is the only good thing. Person loading the plane called 1-6 to board at the same time, made it chaotic. Plane was too small for even putting backpacks in overhead. Seat for normal sized people were too small. The WIFI didn't work. When we landed had to wait because not enough ground crew.

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

Information on your arrival and departure airports