United Flight 3690 Deals & Information (2026/2027)

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 3690 Route Deals From $288

The cheapest prices found with in the last 7 days for return flights were $333 and $288 for one-way flights to Key West Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jul 31 - Wed, Aug 5
ORD
O'Hare Intl.
EYW
Key West Intl.
$333 Roundtrip, found 16 hours ago
$333
Roundtrip
found 16 hours ago
Select United flight, departing Fri, Jul 31 from O'Hare Intl. to Key West Intl., returning Wed, Aug 5, priced at $333 found 16 hours ago
Sat, Nov 14 - Sat, Nov 21
ORD
O'Hare Intl.
EYW
Key West Intl.
$343 Roundtrip, just found
$343
Roundtrip
just found
Select United flight, departing Sat, Nov 14 from O'Hare Intl. to Key West Intl., returning Sat, Nov 21, priced at $343 just found
Sat, Nov 14 - Sat, Nov 21
ORD
O'Hare Intl.
EYW
Key West Intl.
$397 Roundtrip, just found
$397
Roundtrip
just found
Select United flight, departing Sat, Nov 14 from O'Hare Intl. to Key West Intl., returning Sat, Nov 21, priced at $397 just found