United Flight AA4551 Deals & Information (2025/2026)

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United Flight 4551 Route Deals From $209

The cheapest prices found with in the last 7 days for return flights were $189 and $209 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Nov 1 - Tue, Nov 4
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$189 Roundtrip, found 6 days ago
$189
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 1 from Sioux Falls Regional to O'Hare Intl., returning Tue, Nov 4, priced at $189 found 6 days ago
Thu, Aug 28 - Thu, Sep 4
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$210 Roundtrip, found 5 days ago
$210
Roundtrip
found 5 days ago
Select United flight, departing Thu, Aug 28 from Sioux Falls Regional to O'Hare Intl., returning Thu, Sep 4, priced at $210 found 5 days ago
Thu, Sep 4 - Sat, Sep 6
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$216 Roundtrip, found 6 days ago
$216
Roundtrip
found 6 days ago
Select United flight, departing Thu, Sep 4 from Sioux Falls Regional to O'Hare Intl., returning Sat, Sep 6, priced at $216 found 6 days ago
Sat, Sep 13 - Tue, Sep 16
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$217 Roundtrip, found 14 hours ago
$217
Roundtrip
found 14 hours ago
Select United flight, departing Sat, Sep 13 from Sioux Falls Regional to O'Hare Intl., returning Tue, Sep 16, priced at $217 found 14 hours ago
Thu, Sep 4 - Sat, Sep 6
FSD
Sioux Falls Regional
ORD
O'Hare Intl.
$224 Roundtrip, found 6 days ago
$224
Roundtrip
found 6 days ago
Select United flight, departing Thu, Sep 4 from Sioux Falls Regional to O'Hare Intl., returning Sat, Sep 6, priced at $224 found 6 days ago

Frequently asked questions

What route does flight number UA4551 take?
UA4551 flies direct from ORD to Albany International Airport in 2 hours and 1 minute. It can sometimes be used on other routes though, some of which may be multi-stop flights. Keep an eye out for this when locking in your airfare to avoid any confusion.
What terminal does UA4551 fly out of?
Terminal 1 is the terminal you'll likely depart from if you're booked on a flight from O'Hare Airport. Chicago, IL Airport (ORD-O'Hare Intl.) to Albany Intl. Airport (ALB) is the most commonly traveled route for flight number UA4551.
What kind of plane is on flight number UA4551?
If you've booked a seat on flight UA4551 from O'Hare Airport to ALB, there's an excellent chance you'll be traveling aboard the Canadair (Bombardier) Regional Jet 550. Flight UA4551 serves numerous routes, but this is the most popular.
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 UA4551 flight with Travelocity, please visit our Customer Service Portal.