Find cheap flights from San Francisco to Portsmouth - Compare and Save

When flying out of San Francisco you’ll be using San Francisco. Portsmouth does not have its own airport so you’ll be flying into nearby Boston Logan Intl airport, which is 50.3 mi away.

Direct flights cover the 2,696 miles separating San Francisco and Portsmouth in about 5h 28m.

50 direct flights run between San Francisco and Portsmouth on a daily basis. On average, there are about 356 departures each week.

Consider leaving on a Friday and avoid Saturdays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Thursdays and the most expensive ones on Saturdays.

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 Portsmouth.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portsmouth from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

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 Portsmouth with an airline and back to San Francisco with another airline.

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 Portsmouth from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

In the last 5 days, the cheapest one-way ticket between San Francisco and Portsmouth found on KAYAK was with Frontier for $89. Frontier offered a round-trip connection from $116 and Alaska Airlines from $174.