Basic Economy allows a personal item only; no carry-on bags unless exceptions apply.
United Economy Plus offers extra legroom seats at the front of the economy cabin.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $220 (Delta) |
One-way from | $128 (American Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $369 |
Good round-trip deal | $297 or less |
Good one-way deal | $185 or less |
Fly from
Fly to
Route
Depart
Return
Price
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
ven. 12/5
4:40 pm-8:59 am
1 stop19h 19m
San Francisco
dim. 12/7
7:00 am-3:37 pm
Nonstop5h 37m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
mer. 1/14
4:20 pm-10:47 pm
1 stop9h 27m
San Francisco
mar. 1/20
10:16 am-5:39 pm
1 stop28h 23m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
ven. 1/23
1:30 pm-7:55 pm
1 stop9h 25m
San Francisco
sam. 1/31
11:25 pm-8:10 am
Nonstop5h 45m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
mar. 12/16
6:00 am-9:45 am
Nonstop6h 45m
San Francisco
ven. 1/16
12:55 pm-11:49 pm
1 stop7h 54m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
mer. 11/19
7:00 am-1:50 pm
1 stop9h 50m
San Francisco
ven. 12/5
7:00 am-3:37 pm
Nonstop5h 37m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
mer. 1/7
7:00 am-10:59 am
Nonstop6h 59m
San Francisco
dim. 1/11
10:40 pm-12:15 pm
1 stop10h 35m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
mer. 1/21
7:00 am-10:59 am
Nonstop6h 59m
San Francisco
dim. 1/25
7:00 am-6:45 pm
1 stop8h 45m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
lun. 11/24
7:25 am-11:20 am
Nonstop6h 55m
San Francisco
ven. 12/5
12:40 pm-9:20 pm
Nonstop5h 40m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
mer. 2/18
7:19 pm-1:28 am
1 stop9h 09m
San Francisco
dim. 2/22
11:20 pm-10:36 am
1 stop8h 16m
BostonSan Francisco
BOS - SFO
BOSSFO
Boston Logan Intl
lun. 1/26
10:00 am-1:54 pm
Nonstop6h 54m
San Francisco
jeu. 1/29
8:26 am-5:05 pm
Nonstop5h 39m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of $98). Flying from Boston to San Francisco in May is currently the most expensive (average of $179). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from Boston to San Francisco in the evening. Doing so could potentially save you 38% on the flight price compared to flying at noon, which is usually more expensive.
Travelers seeking maximum savings on their Boston to San Francisco flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
About 15% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 168 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Air Canada have had the lowest number of delays on this route, with no flights being classified as delayed.
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Anonymous,Sep 2025
BOS - HNL
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Anonymous,Sep 2025
BOS - HNL
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Anonymous,Sep 2025
BOS - HNL
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Anonymous,Sep 2025
BOS - HNL
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Anonymous,Sep 2025
BOS - HNL
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Anonymous,Sep 2025
BOS - HNL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$84 | Average$212 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$129 | Average$323 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$141 | Average$315 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$153 | Average$380 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$191 | Average$367 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$198 | Average$359 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$228 | Average$367 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$228 | Average$412 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$253 | Average$436 | FlexibilityNo cancel fee | On-time71% |