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Cheap flights from Boston to San Francisco

One-way from $149, found by travellers in the last 7 days. Aviasales checks the live price.

Departure
Return
Prices for nearby dates
Wed, Oct 21Any priceThu, Oct 22Any priceFri, Oct 23Any priceSat, Oct 24$149Sun, Oct 25Any priceMon, Oct 26Any priceTue, Oct 27Any priceWed, Oct 28Any price

Cheapest one-way tickets

Recent finds on different dates, for 1 adult. Baggage and fare rules are shown on Aviasales, where the price is checked live.

Cheapest
$149
Alaska Airlines, flight AS 256Found 2 days ago, 1 adult
Check price on Aviasales
7:51amBostonSat, Oct 24
Travel time 7h 52m, 1 stopBOSSJC
12:43pmSan FranciscoSat, Oct 24
$149
Alaska Airlines, flight AS 256Found 3 days ago, 1 adult
Check price on Aviasales
7:03amBostonTue, Nov 10
Travel time 8h 4m, 1 stopBOSSJC
12:07pmSan FranciscoTue, Nov 10
$157
Alaska Airlines, flight AS 256Found yesterday, 1 adult
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7:03amBostonThu, Nov 5
Travel time 8h 6m, 1 stopBOSSJC
12:09pmSan FranciscoThu, Nov 5
$157
Alaska Airlines, flight AS 256Found yesterday, 1 adult
Check price on Aviasales
7:03amBostonMon, Nov 9
Travel time 8h 6m, 1 stopBOSSJC
12:09pmSan FranciscoMon, Nov 9
$177
jetBlue, flight B6 317Found 2 days ago, 1 adult
Check price on Aviasales
4:09pmBostonSat, Nov 7
Travel time 8h 2m, 1 stopBOSSFO
9:11pmSan FranciscoSat, Nov 7

Round trips

The cheapest return tickets found recently, price for the whole trip.

Plan the rest of the trip

  • Mobile data in United StatesTravel eSIM from $4, installed before you fly.
    Compare plans
  • Getting from the airportTransfers and car hire in San Francisco, booked ahead at a fixed price.
    See options
  • Things to do in San FranciscoPopular tours from $39 per person.
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  • Flight delayed?Delayed or cancelled? See which passenger rights cover this route.
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Price calendar

The lowest one-way fare found for each day over the next 60 days. A dash means no recent fare; you can still pick that day.

October 2026

MoTuWeThFrSaSu1234$4945$2896$2897$2078–9$44310$25811$33312$35713–14–15$20716–17–18–19–20–21–22–23–24$14925–26–27–28–29–30–31–

November 2026

MoTuWeThFrSaSu1–2–3–4–5$1576–7$1778–9$15710$14911–12–13–14–15–16–17–18–19–20–21–22–23–24$22625–26–27–28–29–30–

December 2026

MoTuWeThFrSaSu1–2–345678910111213141516171819202122232425262728293031
$157 or lessGreen: the cheapest fifth of fares on this route. Lowest in these 60 days: Oct 24, $149.

Lowest fares by month

In the fares found this week, November has the lowest: from $158 one-way, against $261 in June 2027. Pick a month to see its cheapest date.

$0$100$200$300Oct$158NovDecJanFebMarAprMayJunJulAugSep
Show as a table
MonthCheapest one-wayDateStops
October$160Sat, Oct 241 stop
November$158Tue, Nov 101 stop
December—
January 2027—
February 2027—
March 2027—
April 2027—
May 2027—
June 2027$261Sat, Jun 19Nonstop
July 2027—
August 2027—
September 2027—

Questions travellers ask

What is the cheapest month to fly from Boston to San Francisco?

In the fares found this week, November has the lowest: from $158 one-way, against $261 in June 2027.

Are there direct flights from Boston to San Francisco?

Yes. Recent fares include nonstop flights with jetBlue and United Airlines.

How long is the flight from Boston to San Francisco?

A nonstop flight takes about 6h 26m. The distance is 2,697 mi.

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