San Francisco to Boston SFO → BOS
San Francisco International Airport (SFO) → Logan International Airport (BOS)
The cheapest return found recently is $467 with jetBlue, 6 Mar 2027 – 8 Mar 2027, found yesterday. The cheapest one-way found recently is $210 with Frontier Airlines, 26 Nov, found 3 days ago.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$467
6 Mar 2027 – 8 Mar 2027 · jetBlue
San Francisco International Airport (SFO) → Logan International Airport (BOS)
Leaves 8:44 p.m. · Return leaves 12:40 p.m. · 15 h 11 min of travel, both ways together
out nonstop, back 1 stop
found yesterday
Cheapest nonstop return
$354
5 Nov – 8 Nov · jetBlue
San Francisco International Airport (SFO) → Logan International Airport (BOS)
Leaves 7:30 a.m. · Return leaves 6:00 a.m. · 12 h 15 min of travel, both ways together
out nonstop, back nonstop
found 6 days ago
Found recently, and the cheapest we hold
$467 6 Mar 2027 – 8 Mar 2027found yesterdaySee prices for these dates
$354 5 Nov – 8 Novfound 6 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $279 to $488.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Not enough comparable prices yet: we hold return fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 2-night return fares leaving within 3 days of 6 Mar 2027 to compare.
Every date we hold
2 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 5 Nov – 8 Nov | $354 | jetBlue | San Francisco International Airport (SFO) → Logan International Airport (BOS) | out nonstop, back nonstop | found 6 days ago | See prices for these dates |
| 6 Mar 2027 – 8 Mar 2027 | $467 | jetBlue | San Francisco International Airport (SFO) → Logan International Airport (BOS) | out nonstop, back 1 stop | found yesterday | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $354.
Airlines on the cheapest dates: jetBlue.
One-way
The cheapest one-way fare on each of 5 departure dates is usually $210 to $219.
Cheapest one-way found recently
$210
26 Nov · Frontier Airlines
San Francisco International Airport (SFO) → Logan International Airport (BOS)
Leaves 11:41 a.m. · 17 h trip
2 stops
found 3 days ago
Cheapest nonstop one-way
$213
25 Nov · jetBlue
San Francisco International Airport (SFO) → Logan International Airport (BOS)
Leaves 6:00 a.m. · 5 h 31 min trip
nonstop
found 5 days ago
Found recently, and the cheapest we hold
$210 26 Novfound 3 days agoOpen this trip
$176 12 Jan 2027found 6 days agoOpen this trip
What have prices looked like?
Over 17 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $152 to $251.
17 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 5 departure dates from 20 Nov to 12 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
No. We hold one-way fares on 2 other departure dates within 3 days of 26 Nov, and none is cheaper.
Every date we hold
5 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Nov | $260 | Frontier Airlines | San Francisco International Airport (SFO) → Logan International Airport (BOS) | 1 stop | found 3 days ago | Open this trip |
| 25 Nov | $213 | jetBlue | San Francisco International Airport (SFO) → Logan International Airport (BOS) | nonstop | found 5 days ago | Open this trip |
| 26 Nov | $210 | Frontier Airlines | San Francisco International Airport (SFO) → Logan International Airport (BOS) | 2 stops | found 3 days ago | Open this trip |
| 27 Nov | $219 | American Airlines | San Francisco International Airport (SFO) → Logan International Airport (BOS) | 1 stop | found 3 days ago | Open this trip |
| 12 Jan 2027 | $176 | jetBlue | San Francisco International Airport (SFO) → Logan International Airport (BOS) | nonstop | found 6 days ago | Open this trip |
Which month looks cheapest?
January 2027 is the cheapest month — from $176.
Airlines on the cheapest dates: Frontier Airlines, jetBlue, American Airlines.
Premium cabin fares from San Francisco to Boston
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 6 Mar 2027 – 8 Mar 2027 in another cabin: Premium economy · Business · First
Today's prices for 26 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for San Francisco to Boston?
Return
The cheapest fares were 14 to 29 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $279 | $279 | Cheapest seen | 15 |
| 30–59 days | $317 | $284 | +14% | 20 |
| 90–179 days | $437 | $437 | +57% | 13 |
One-way
Not enough history yet: in 17 days of one-way prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
San Jose → Boston
67 km from San Francisco
$469
$2 more than flying from San Francisco
6 Mar 2027 – 8 Mar 2027 · SJC → BOS · out 1 stop, back 1 stop
found yesterday
Oakland → Boston
13 km from San Francisco
$488
$21 more than flying from San Francisco
6 Mar 2027 – 8 Mar 2027 · OAK → BOS · out 1 stop, back 1 stop
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
San Jose → Boston
67 km from San Francisco
$220
$10 more than flying from San Francisco
27 Nov · SJC → BOS · 1 stop
found 3 days ago
Oakland → Boston
13 km from San Francisco
$229
$19 more than flying from San Francisco
26 Nov · OAK → BOS · 1 stop
found 3 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 6 Mar 2027 – 8 Mar 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work