SFO - ABE

$179 Find Cheap Flights from San Francisco 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 San Francisco to Allentown departing on 2/21. 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 San Francisco 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 San Francisco to Allentown, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$309
Typical prices: $356-$508
American Airlines
Wed 2/25Tue 3/10
SFO - ABE • 1 stop
Cheapest one-way
$210
Typical prices: $181-$314
Delta
Sat 2/21
SFO - ABE • 1 stop
Top airlines
United Airlines
Cheapest • from $359 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 52% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Allentown!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to Allentown (SFO-ABE)

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

Wed, Feb 25 - Tue, Mar 10
American Airlines Logo
12:31 pm - 11:31 pm
SFO
-
ABE
8h 00m
1 stop
American Airlines Logo
12:45 pm - 8:14 pm
ABE
-
SFO
10h 29m
1 stop
$309American Airlines
Thu, Feb 19 - Sat, Feb 21
United Airlines Logo
11:59 pm - 10:01 am
SFO
-
ABE
7h 02m
1 stop
United Airlines Logo
5:23 pm - 11:24 pm
ABE
-
SFO
9h 01m
1 stop
$359United Airlines
Sat, Feb 14 - Wed, Feb 18
United Airlines Logo
11:59 pm - 10:01 am
SFO
-
ABE
7h 02m
1 stop
United Airlines Logo
10:36 am - 5:40 pm
ABE
-
SFO
10h 04m
1 stop
$389United Airlines
Sat, Feb 21 - Wed, Feb 25
United Airlines Logo
10:50 pm - 10:01 am
SFO
-
ABE
8h 11m
1 stop
United Airlines Logo
5:23 pm - 11:26 pm
ABE
-
SFO
9h 03m
1 stop
$398United Airlines
Fri, Mar 6 - Mon, Mar 9
Delta Logo
11:47 am - 10:49 pm
SFO
-
ABE
8h 02m
1 stop
Delta Logo
5:58 pm - 12:35 am
ABE
-
SFO
9h 37m
1 stop
$408Delta
Sat, Feb 21 - Wed, Feb 25
United Airlines Logo
6:45 am - 4:48 pm
SFO
-
ABE
7h 03m
1 stop
United Airlines Logo
5:23 pm - 11:26 pm
ABE
-
SFO
9h 03m
1 stop
$429United Airlines
Thu, Feb 19 - Sat, Feb 21
American Airlines Logo
10:36 am - 12:29 am
SFO
-
ABE
10h 53m
2 stops
American Airlines Logo
12:00 pm - 7:03 pm
ABE
-
SFO
10h 03m
1 stop
$439American Airlines
Thu, Feb 19 - Sat, Feb 21
American Airlines Logo
10:36 am - 12:29 am
SFO
-
ABE
10h 53m
2 stops
American Airlines Logo
6:04 am - 3:09 pm
ABE
-
SFO
12h 05m
2 stops
$444American Airlines
Thu, Apr 23 - Mon, Apr 27
United Airlines Logo
10:50 pm - 9:58 am
SFO
-
ABE
8h 08m
1 stop
United Airlines Logo
5:38 pm - 12:19 am
ABE
-
SFO
9h 41m
1 stop
$459United Airlines
Fri, Feb 13 - Mon, Feb 16
United Airlines Logo
10:50 pm - 11:50 am
SFO
-
ABE
10h 00m
1 stop
United Airlines Logo
10:36 am - 5:40 pm
ABE
-
SFO
10h 04m
1 stop
$466United Airlines
Booking Insights

KAYAK's insights & trends for San Francisco to Allentown flights

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

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

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

What is the cheapest month to fly from San Francisco to Allentown?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco 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 San Francisco to Allentown is January, where tickets cost $298 (return) on average. On the other hand, the most expensive months are November and June, where the average cost of round-trip tickets is $2,319 and $750 respectively.

Good to know

Low seasonSeptember
Cheapest flight$210
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from San Francisco to Allentown

When to book flights from San Francisco to Allentown

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

  • What is the cheapest flight from San Francisco to Allentown?

    In the last 3 days, the lowest price for a flight from San Francisco to Allentown was $284 for a one-way ticket and $359 for a round-trip.

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

    No

  • Which aircraft models fly most regularly from San Francisco to Allentown?

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

  • Which airline alliances offer flights from San Francisco to Allentown?

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

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

    The two airlines most popular with KAYAK users for flights from San Francisco to Allentown are Delta and United Airlines. With an average price for the route of $453 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 $637 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from San Francisco 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 San Francisco to Allentown.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Allentown from San Francisco 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 San Francisco 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 San Francisco with another airline. Booking your flights between San Francisco 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 San Francisco 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 San Francisco 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 San Francisco to Allentown

 
See real verified KAYAK customer reviews for airlines flying from San Francisco 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 San Francisco 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 8128 reviews
8.1Boarding
7.2Food
7.8Entertainment
7.9Comfort
8.5Crew
Airline reviews

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

10.0 ExcellentDr. Simon, Jan 2026
LAX - JFK
Read more Delta reviews

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

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.

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.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

The flight crew where really good. Better then the crew from BNE to SFO

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Premium Plus is a really good idea for longer flights

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.

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.

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.

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

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

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

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

Everything you need to know for your flight from San Francisco to Allentown

Information on your arrival and departure airports