Cheap flights from San Francisco International to Allentown

Compare San Francisco International to Allentown flight deals

Find the cheapest month or even day of the year to fly to Allentown

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Flight deals from San Francisco International to Allentown

Looking for a cheap last-minute deal or the best round-trip flight from San Francisco International Airport to Allentown Airport? If you want to travel next month, round-trip fares start from $491. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from San Francisco International to Allentown

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to Allentown flights are currently cheapest in October.

San Francisco to Allentown: Flight information

The things to know before you go.
Cheapest flight found$403
Cheapest month to flyOctober

Finding cheap flights from San Francisco International to Allentown: Frequently asked questions

The best price we found for a round-trip flight from San Francisco International to Allentown is $402. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from San Francisco International to Allentown. But we found flights with one or more stops from $403.
There are no flights flying from San Francisco International to Allentown, as of May 2026.
The cheapest month to fly from San Francisco International to Allentown is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to Allentown Airport on Friday, October 2, 2026.
No airlines currently offer direct flights between San Francisco International Airport and Allentown Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Allentown but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Allentown is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, United offers the cheapest flight tickets to Allentown.

Flying from San Francisco International Airport (SFO) to Lehigh Valley International Airport (ABE): what you need to know

  • Your SFO to ABE flight won't wait if you're late, so get to the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • Be prepared for longer lines during popular months like August. Arriving up to four hours ahead of international flights and two hours for a domestic departure is a good idea.

  • Think about adding a stopover when booking your ticket from San Francisco International Airport to Lehigh Valley International Airport. Simply uncheck 'Direct flights only' to break up your journey, or perhaps explore a new destination along the way. Check out these options between SFO and ABE:

    • Denver International Airport

    • Hartsfield-Jackson Atlanta International Airport

    • O'Hare International Airport

How to find the cheapest flights from San Francisco International Airport (SFO) to Lehigh Valley International Airport (ABE)

  • The cheapest price we've found for a one-way San Francisco International Airport to Lehigh Valley International Airport flight is $211. A round-trip fare right now is $402. Depending on the availability and when you book, these fares may change.

  • Don't leave everything to the last minute. You're more likely to find cheap tickets from SFO to ABE if you book early. Airlines often have some great early bird discounts.

  • The 'Whole month' tool shows you the cheapest flights from San Francisco International Airport to Lehigh Valley International Airport across the month. It's a great way to snap up a bargain if your travel dates aren't set in stone.

  • Spend less time searching for cheap flights from SFO to ABE by setting up a Price Alert. You'll receive an email or notification on the app when fares go down.

  • Tailor your trip with filters. Select your preferred departure and arrival times, total journey duration and airlines. You can also sort results by 'Fastest,' 'Cheapest' or 'Best' flights from San Francisco International Airport to Lehigh Valley International Airport.

Handy information about San Francisco International Airport (SFO)

  • Of all flights leaving San Francisco International Airport, 77.36% land on schedule at their destination.

  • Central San Francisco to San Francisco International Airport is approximately 21 kilometers. Depending on traffic, it'll take about 20 minutes to get there if you're driving, ride-sharing or catching a cab.

  • You can expect a trip time of about 45 minutes on public transport.

  • Get your journey off to a stress-free start by staying near SFO. Whether you're catching an early flight from San Francisco International Airport to Lehigh Valley International Airport or want to avoid feeling rushed, these hotels are perfect:

Arriving at Lehigh Valley International Airport (ABE)

Getting from Lehigh Valley International Airport (ABE) to central Allentown

  • The street address for ABE is 3311 Airport Road.

  • Lehigh Valley International Airport to the center of Allentown has a drive time of around 10 minutes. It's approximately 8 kilometers away.

  • If you're taking public transport, expect a journey of around 30 minutes.

When to fly to Lehigh Valley International Airport (ABE)

  • July is the busiest month for flights from San Francisco International Airport to Lehigh Valley International Airport. For a quieter experience, head to Allentown in April.

  • Before locking in your flight from San Francisco International Airport to Lehigh Valley International Airport, think about the kind of weather you enjoy. July is the warmest month in Allentown, with temperatures ranging from 15ºC (59ºF) to 30ºC (86ºF).

  • If you like cooler conditions, search for a cheap ticket from SFO to ABE in January. Temperatures average between -9ºC (16ºF) and 7ºC (45ºF) then.

Explore more of United States

  • You've done Allentown, now it's time to discover other corners of United States. Journey about 121 kilometers east to New York to check off its leading sights. From Statue of Liberty to Central Park and Empire State Building, you'll have a packed itinerary ahead.

  • If you're looking to explore another major stop in United States, head for Philadelphia, about 80 kilometers south of Allentown. Liberty Bell, Independence Hall and Philadelphia Museum of Art are the start of reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.