United Flight 5645 Deals & Information (2026/2027)

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United Flight 5645 Route Deals From $269

The cheapest prices found with in the last 7 days for return flights were $299 and $269 for one-way flights to Sioux Falls Regional for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 5 - Sun, Nov 8
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$299 Roundtrip, found 2 hours ago
$299
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Nov 5 from O'Hare Intl. to Sioux Falls Regional, returning Sun, Nov 8, priced at $299 found 2 hours ago
Thu, Nov 5 - Sun, Nov 8
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$312 Roundtrip, found 2 hours ago
$312
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Nov 5 from O'Hare Intl. to Sioux Falls Regional, returning Sun, Nov 8, priced at $312 found 2 hours ago
Thu, Oct 22 - Sun, Oct 25
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$317 Roundtrip, found 20 hours ago
$317
Roundtrip
found 20 hours ago
Select United flight, departing Thu, Oct 22 from O'Hare Intl. to Sioux Falls Regional, returning Sun, Oct 25, priced at $317 found 20 hours ago
Thu, Nov 5 - Sun, Nov 8
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$325 Roundtrip, found 2 hours ago
$325
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Nov 5 from O'Hare Intl. to Sioux Falls Regional, returning Sun, Nov 8, priced at $325 found 2 hours ago
Sun, Oct 11 - Sun, Oct 18
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$329 Roundtrip, found 6 days ago
$329
Roundtrip
found 6 days ago
Select United flight, departing Sun, Oct 11 from O'Hare Intl. to Sioux Falls Regional, returning Sun, Oct 18, priced at $329 found 6 days ago
Fri, Oct 23 - Sun, Oct 25
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$332 Roundtrip, found 2 hours ago
$332
Roundtrip
found 2 hours ago
Select United flight, departing Fri, Oct 23 from O'Hare Intl. to Sioux Falls Regional, returning Sun, Oct 25, priced at $332 found 2 hours ago
Tue, Nov 24 - Tue, Dec 1
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$337 Roundtrip, found 6 days ago
$337
Roundtrip
found 6 days ago
Select United flight, departing Tue, Nov 24 from O'Hare Intl. to Sioux Falls Regional, returning Tue, Dec 1, priced at $337 found 6 days ago
Wed, Oct 14 - Mon, Oct 19
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$339 Roundtrip, found 6 days ago
$339
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 14 from O'Hare Intl. to Sioux Falls Regional, returning Mon, Oct 19, priced at $339 found 6 days ago
Sun, Oct 11 - Sun, Oct 18
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$340 Roundtrip, found 6 days ago
$340
Roundtrip
found 6 days ago
Select United flight, departing Sun, Oct 11 from O'Hare Intl. to Sioux Falls Regional, returning Sun, Oct 18, priced at $340 found 6 days ago
Sat, Oct 24 - Mon, Oct 26
ORD
O'Hare Intl.
FSD
Sioux Falls Regional
$342 Roundtrip, found 5 days ago
$342
Roundtrip
found 5 days ago
Select United flight, departing Sat, Oct 24 from O'Hare Intl. to Sioux Falls Regional, returning Mon, Oct 26, priced at $342 found 5 days ago

Frequently asked questions

What route does flight number UA5645 take?
Flight number UA5645 takes 2 hours and 8 minutes to fly directly from Los Angeles Intl. Airport (LAX) to EUG. Sure, there's magic in the destination, but the journey is always half the fun!
What terminal does UA5645 fly out of?
Direct flights to and from Los Angeles Intl. Airport (LAX) and Mahlon Sweet Field are served by UA5645, and those traveling on this flight typically jet off from Terminal 7.
What kind of plane is on flight number UA5645?
The route for flight number UA5645 is most commonly LAX to EUG, and the Embraer 175 is the aircraft model you'll probably be traveling on.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA5645 flight with Travelocity, please visit our Customer Service Portal.