United Flight UA4451 Deals & Information (2025/2026)

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United Flight 4451 Route Deals From $224

The cheapest prices found with in the last 7 days for return flights were $209 and $224 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 4 - Sun, Oct 5
SCE
University Park
ORD
O'Hare Intl.
$209 Roundtrip, found 2 days ago
$209
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 4 from University Park to O'Hare Intl., returning Sun, Oct 5, priced at $209 found 2 days ago
Sat, Oct 4 - Sun, Oct 5
SCE
University Park
ORD
O'Hare Intl.
$219 Roundtrip, found 2 days ago
$219
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 4 from University Park to O'Hare Intl., returning Sun, Oct 5, priced at $219 found 2 days ago
Sat, Oct 4 - Sun, Oct 5
SCE
University Park
ORD
O'Hare Intl.
$229 Roundtrip, found 2 days ago
$229
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 4 from University Park to O'Hare Intl., returning Sun, Oct 5, priced at $229 found 2 days ago
Sat, Oct 4 - Sun, Oct 5
SCE
University Park
ORD
O'Hare Intl.
$239 Roundtrip, found 2 days ago
$239
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 4 from University Park to O'Hare Intl., returning Sun, Oct 5, priced at $239 found 2 days ago
Thu, Oct 2 - Sun, Oct 5
SCE
University Park
ORD
O'Hare Intl.
$246 Roundtrip, found 5 days ago
$246
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 2 from University Park to O'Hare Intl., returning Sun, Oct 5, priced at $246 found 5 days ago
Sat, Oct 4 - Mon, Oct 6
SCE
University Park
ORD
O'Hare Intl.
$248 Roundtrip, found 2 days ago
$248
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 4 from University Park to O'Hare Intl., returning Mon, Oct 6, priced at $248 found 2 days ago
Wed, Sep 3 - Sun, Sep 7
SCE
University Park
ORD
O'Hare Intl.
$257 Roundtrip, found 4 days ago
$257
Roundtrip
found 4 days ago
Select United flight, departing Wed, Sep 3 from University Park to O'Hare Intl., returning Sun, Sep 7, priced at $257 found 4 days ago
Fri, Jun 27 - Sun, Jun 29
SCE
University Park
ORD
O'Hare Intl.
$261 Roundtrip, found 2 days ago
$261
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jun 27 from University Park to O'Hare Intl., returning Sun, Jun 29, priced at $261 found 2 days ago
Sat, Oct 4 - Sun, Oct 5
SCE
University Park
ORD
O'Hare Intl.
$267 Roundtrip, found 2 days ago
$267
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 4 from University Park to O'Hare Intl., returning Sun, Oct 5, priced at $267 found 2 days ago
Sat, Oct 4 - Sun, Oct 5
SCE
University Park
ORD
O'Hare Intl.
$272 Roundtrip, found 2 days ago
$272
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 4 from University Park to O'Hare Intl., returning Sun, Oct 5, priced at $272 found 2 days ago

Frequently asked questions

What route does flight number UA4451 take?
UA4451 operates from O'Hare Intl. Airport (ORD) to Lambert-St. Louis Intl. Airport (STL) directly. This service typically takes 1 hour and 21 minutes.
What terminal does UA4451 fly out of?
You'll likely be jetting out of Terminal 1 if you're traveling on flight number UA4451 direct from O'Hare Intl. Airport (ORD) to Lambert-St. Louis Intl. Airport (STL).
What kind of plane is on flight number UA4451?
You'll probably be on a Canadair (Bombardier) Regional Jet 550 if you're on flight number UA4451. Generally, this flight heads off from Chicago, IL Airport (ORD-O'Hare Intl.) and arrives at STL.
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 UA4451 flight with Travelocity, please visit our Customer Service Portal.