United Flight DL1665 Deals & Information (2025/2026)

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United Flight 1665 Route Deals From $169

The cheapest prices found with in the last 7 days for return flights were $242 and $169 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 3 - Wed, Jun 11
SFO
San Francisco Intl.
BOS
Logan Intl.
$242 Roundtrip, found 8 hours ago
$242
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Jun 3 from San Francisco Intl. to Logan Intl., returning Wed, Jun 11, priced at $242 found 8 hours ago
Sun, May 18 - Tue, May 20
SFO
San Francisco Intl.
BOS
Logan Intl.
$262 Roundtrip, just found
$262
Roundtrip
just found
Select United flight, departing Sun, May 18 from San Francisco Intl. to Logan Intl., returning Tue, May 20, priced at $262 just found