United Flight 9721 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 9721 Route Deals From $464

The cheapest prices found with in the last 7 days for return flights were $598 and $464 for one-way flights to Zürich for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Apr 23 - Thu, Apr 30
BOS
Logan Intl.
ZRH
Zürich
$598 Roundtrip, found 8 hours ago
$598
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Apr 23 from Logan Intl. to Zürich, returning Thu, Apr 30, priced at $598 found 8 hours ago