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Get United's best fares today on flights from San Francisco to Boston from

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FromToDatesFare TypePrice

San Francisco (SFO)

Boston (BOS)

Depart: 05/29/20

Return date 06/06/20

Roundtrip
from
$294*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 12/15/19

Return date 12/19/19

Roundtrip
from
$411*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 11/30/19

Return date 11/30/19

Roundtrip
from
$1,214*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 06/11/20

Return date 06/14/20

Roundtrip
from
$416*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 12/19/19

Return date 01/06/20

Roundtrip
from
$531*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 12/31/19

Return date 01/08/20

Roundtrip
from
$594*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 06/06/20

Return date 06/18/20

Roundtrip
from
$294*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 12/24/19

Return date 01/01/20

Roundtrip
from
$484*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 12/26/19

Return date 01/01/20

Roundtrip
from
$900*
Viewed:1dayago

San Francisco (SFO)

Boston (BOS)

Depart: 12/07/19

Return date 12/11/19

Roundtrip
from
$286*
Viewed:1dayago

*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Weather in Boston

Friday light rain
51°F 11/22/19
Saturday sky is clear
38°F 11/23/19
Sunday heavy intensity rain
40°F 11/24/19
Monday sky is clear
43°F 11/25/19
Tuesday sky is clear
44°F 11/26/19
Wednesday light rain
56°F 11/27/19
Thursday sky is clear
38°F 11/28/19
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