Due to multiple factors, expect to potentially pay more when booking in December. For low rates, February can be a great choice for travel to Portsmouth. Flights to Portsmouth from San Francisco in February are about $510 on average during February, but can be found for as low as $369.
When flying from San Francisco to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 79% on flights from San Francisco to Portsmouth compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $701. For sooner than that we have options available in the next 3 days from $885.
Airline | Cheapest | Average | Flexibility | On-time | COVID-19 safety | |
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$9 | $18 | No cancel fee | 66% |
We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information. |
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$351 | $665 | No cancel fee | 77% | ||
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$352 | $555 | No cancel fee | N/A | ||
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$364 | $759 | No cancel fee | 74% | ||
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$415 | $599 | No cancel fee | 77% | ||
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$427 | $754 | No cancel fee | 76% | ||
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$440 | $1,001 | No cancel fee | 79% | ||
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$477 | $999 | No cancel fee | 78% | ||
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$491 | $1,840 | No cancel fee | 81% | ||
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$496 | $800 | No cancel fee | 77% |
Afternoon Noon to 6 PM | 50% of SFO to Portsmouth departures |
Evening 6 PM to midnight | 50% of SFO to Portsmouth departures |
Early morning Midnight to 6 AM | 0% of SFO to Portsmouth departures |
Morning 6 AM to noon | 0% of SFO to Portsmouth departures |