United Flight DL1665 Deals & Information (2025/2026)

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United Flight 1665 Route Deals From $122

The cheapest prices found with in the last 7 days for return flights were $259 and $122 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 1 - Thu, Jul 31
SFO
San Francisco Intl.
BOS
Logan Intl.
$259 Roundtrip, found 1 hour ago
$259
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Jul 1 from San Francisco Intl. to Logan Intl., returning Thu, Jul 31, priced at $259 found 1 hour ago