United Flight 3690 Deals & Information (2025/2026)

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United Flight 3690 Route Deals From $220

The cheapest prices found with in the last 7 days for return flights were $189 and $220 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jan 24 - Sat, Jan 31
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$189 Roundtrip, found 13 hours ago
$189
Roundtrip
found 13 hours ago
Select United flight, departing Sat, Jan 24 from Sioux Falls Regional to O'Hare Intl., returning Sat, Jan 31, priced at $189 found 13 hours ago
Fri, Jan 9 - Fri, Jan 16
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$204 Roundtrip, found 2 days ago
$204
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jan 9 from Sioux Falls Regional to O'Hare Intl., returning Fri, Jan 16, priced at $204 found 2 days ago
Thu, Mar 26 - Sun, Mar 29
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$222 Roundtrip, found 5 days ago
$222
Roundtrip
found 5 days ago
Select United flight, departing Thu, Mar 26 from Sioux Falls Regional to O'Hare Intl., returning Sun, Mar 29, priced at $222 found 5 days ago
Thu, Jan 29 - Sun, Feb 1
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$223 Roundtrip, found 2 days ago
$223
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jan 29 from Sioux Falls Regional to O'Hare Intl., returning Sun, Feb 1, priced at $223 found 2 days ago
Sat, Jan 24 - Sat, Jan 31
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$249 Roundtrip, found 13 hours ago
$249
Roundtrip
found 13 hours ago
Select United flight, departing Sat, Jan 24 from Sioux Falls Regional to O'Hare Intl., returning Sat, Jan 31, priced at $249 found 13 hours ago
Thu, Mar 26 - Sun, Mar 29
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$254 Roundtrip, found 5 days ago
$254
Roundtrip
found 5 days ago
Select United flight, departing Thu, Mar 26 from Sioux Falls Regional to O'Hare Intl., returning Sun, Mar 29, priced at $254 found 5 days ago
Thu, Jan 29 - Sun, Feb 1
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$261 Roundtrip, found 2 days ago
$261
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jan 29 from Sioux Falls Regional to O'Hare Intl., returning Sun, Feb 1, priced at $261 found 2 days ago