Cheap flights from San Francisco, CA to Allentown, PA

Travelers frequently search for route combinations, such as San Francisco and London, Dublin, Manchester, New Delhi, Las Vegas, Glasgow, Athens, Los Angeles, Atlanta, Sydney, Paris, Chicago, Hyderabad, Tahiti, New York, Washington, D.C., Toronto, Denver, Bengaluru, Minneapolis.

Travelers frequently search for route combinations, such as Allentown and San Juan, Shreveport, Manchester, Indianapolis, London, New York, Orlando, Las Vegas, Denver, Chicago, Miami, Los Angeles, Atlanta, Mexico City, Bogotá, Dallas, Phoenix, Philadelphia, Cancún, Houston.

The main airport in San Francisco is San Francisco International. It is also served by San Francisco International, Oakland International, Sacramento International, San Jose International, Monterey Regional, Stockton Metropolitan, Charles M. Schulz–Sonoma County, Merced Regional, Buchanan Field.

The main airport in Allentown is Lehigh Valley International. It is also served by Newark Liberty International, Philadelphia International, Baltimore–Washington International, LaGuardia, New York Stewart International Airport, Ronald Reagan Washington National, Atlantic City International, Lehigh Valley International, Westchester County, Harrisburg International.

Yes, it's possible to combine different modes of transport between San Francisco and Allentown thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between San Francisco and Allentown can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.

Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.

Currently, you can fly between San Francisco and Allentown with United Airlines.

If you don’t have specific dates for your trip between San Francisco and Allentown, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

Traveling between San Francisco and Allentown, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What's more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.