ABE

$129 Find Cheap Flights from San Francisco Bay Area 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 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

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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
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from San Francisco Bay Area to Allentown

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco Bay Area 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 Bay Area 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, Feb 19 - Sat, Feb 21
Delta Logo
10:35 pm - 12:05 pm
SJC
-
ABE
10h 30m
1 stop
Delta Logo
12:47 pm - 9:18 pm
ABE
-
SJC
11h 31m
1 stop
$677Delta
Thu, Feb 19 - Sat, Feb 21
Delta Logo
10:35 pm - 12:05 pm
SJC
-
ABE
10h 30m
1 stop
Delta Logo
12:47 pm - 10:05 pm
ABE
-
SJC
12h 18m
2 stops
$802Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$210
Best time to beat the crowds but there is an average 6% increase in price.
Flight from San Francisco to Allentown

FAQs for booking flights from San Francisco Bay Area to Allentown

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

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

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

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco Bay Area 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 Bay Area 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 Bay Area to Allentown

 
Need help choosing which airline to fly with from San Francisco Bay Area 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
7.9Comfort
8.5Crew
7.8Entertainment
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.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

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

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

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

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

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.

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.

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