United Flight 1857 Deals & Information (2026/2027)

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United Flight 1857 Route Deals From $169

The cheapest prices found with in the last 7 days for return flights were $261 and $169 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jul 17 - Sat, Jul 18
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$261 Roundtrip, found 5 days ago
$261
Roundtrip
found 5 days ago
Select United flight, departing Fri, Jul 17 from Sioux Falls Regional to O'Hare Intl., returning Sat, Jul 18, priced at $261 found 5 days ago
Mon, Jun 22 - Mon, Jun 29
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$264 Roundtrip, found 6 days ago
$264
Roundtrip
found 6 days ago
Select United flight, departing Mon, Jun 22 from Sioux Falls Regional to O'Hare Intl., returning Mon, Jun 29, priced at $264 found 6 days ago
Fri, May 1 - Thu, May 7
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$274 Roundtrip, just found
$274
Roundtrip
just found
Select United flight, departing Fri, May 1 from Sioux Falls Regional to O'Hare Intl., returning Thu, May 7, priced at $274 just found
Thu, Jul 2 - Sun, Jul 5
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$280 Roundtrip, found 1 day ago
$280
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jul 2 from Sioux Falls Regional to O'Hare Intl., returning Sun, Jul 5, priced at $280 found 1 day ago
Wed, Jun 10 - Mon, Jun 15
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$282 Roundtrip, found 3 days ago
$282
Roundtrip
found 3 days ago
Select United flight, departing Wed, Jun 10 from Sioux Falls Regional to O'Hare Intl., returning Mon, Jun 15, priced at $282 found 3 days ago
Fri, May 1 - Thu, May 7
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$290 Roundtrip, just found
$290
Roundtrip
just found
Select United flight, departing Fri, May 1 from Sioux Falls Regional to O'Hare Intl., returning Thu, May 7, priced at $290 just found
Thu, Jul 2 - Sun, Jul 5
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$293 Roundtrip, found 1 day ago
$293
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jul 2 from Sioux Falls Regional to O'Hare Intl., returning Sun, Jul 5, priced at $293 found 1 day ago
Thu, Jul 2 - Sun, Jul 5
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$295 Roundtrip, found 1 day ago
$295
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jul 2 from Sioux Falls Regional to O'Hare Intl., returning Sun, Jul 5, priced at $295 found 1 day ago
Sat, Aug 1 - Sun, Aug 2
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$304 Roundtrip, found 3 days ago
$304
Roundtrip
found 3 days ago
Select United flight, departing Sat, Aug 1 from Sioux Falls Regional to O'Hare Intl., returning Sun, Aug 2, priced at $304 found 3 days ago
Thu, May 14 - Sun, May 17
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$305 Roundtrip, found 1 hour ago
$305
Roundtrip
found 1 hour ago
Select United flight, departing Thu, May 14 from Sioux Falls Regional to O'Hare Intl., returning Sun, May 17, priced at $305 found 1 hour ago