United Flight AA4505 Deals & Information (2025/2026)

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United Flight 4505 Route Deals From $39

The cheapest prices found with in the last 7 days for return flights were $77 and $39 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 22 - Thu, Oct 23
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$77 Roundtrip, found 2 days ago
$77
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $77 found 2 days ago
Wed, Oct 22 - Thu, Oct 23
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$84 Roundtrip, found 2 days ago
$84
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $84 found 2 days ago
Tue, Nov 11 - Wed, Nov 12
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$94 Roundtrip, found 2 days ago
$94
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 11 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Nov 12, priced at $94 found 2 days ago
Tue, Nov 11 - Wed, Nov 12
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$102 Roundtrip, found 2 days ago
$102
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 11 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Nov 12, priced at $102 found 2 days ago
Tue, Nov 11 - Wed, Nov 12
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$109 Roundtrip, found 2 days ago
$109
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 11 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Nov 12, priced at $109 found 2 days ago
Wed, Oct 22 - Thu, Oct 23
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$116 Roundtrip, found 2 days ago
$116
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $116 found 2 days ago
Wed, Oct 22 - Thu, Oct 23
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$126 Roundtrip, found 2 days ago
$126
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $126 found 2 days ago
Tue, Nov 11 - Wed, Nov 12
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$132 Roundtrip, found 2 days ago
$132
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 11 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Nov 12, priced at $132 found 2 days ago
Wed, Dec 17 - Sat, Jan 10
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$138 Roundtrip, found 2 days ago
$138
Roundtrip
found 2 days ago
Select United flight, departing Wed, Dec 17 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sat, Jan 10, priced at $138 found 2 days ago
Wed, Oct 22 - Thu, Oct 23
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$139 Roundtrip, found 2 days ago
$139
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $139 found 2 days ago
Tue, Nov 11 - Wed, Nov 12
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$140 Roundtrip, found 2 days ago
$140
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 11 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Nov 12, priced at $140 found 2 days ago

Frequently asked questions

What route does flight number UA4505 take?
UA4505 is used on multiple routes, but the most common is between Bradley International Airport and O'Hare Intl. Airport (ORD). If your flight goes direct, you'll arrive in 2 hours and 40 minutes. Multi-stop flights can also operate under the same number, as can services on other routes.
What kind of plane is on flight number UA4505?
UA4505 is a flight number that serves multiple routes. If you have a ticket on its most popular one, Bradley International Airport to O'Hare Intl. Airport (ORD), you'll likely be climbing aboard the Canadair (Bombardier) Regional Jet 550.
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 UA4505 flight with Travelocity, please visit our Customer Service Portal.