United Flight 4528 Deals & Information (2026/2027)

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United Flight 4528 Route Deals From $59

The cheapest prices found with in the last 7 days for return flights were $117 and $59 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Dec 25 - Tue, Dec 29
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$117 Roundtrip, just found
$117
Roundtrip
just found
Select United flight, departing Fri, Dec 25 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Dec 29, priced at $117 just found
Tue, Dec 1 - Mon, Dec 7
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$123 Roundtrip, found 5 days ago
$123
Roundtrip
found 5 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Dec 7, priced at $123 found 5 days ago
Wed, Dec 30 - Thu, Dec 31
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$126 Roundtrip, found 16 hours ago
$126
Roundtrip
found 16 hours ago
Select United flight, departing Wed, Dec 30 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Dec 31, priced at $126 found 16 hours ago
Fri, Dec 25 - Wed, Dec 30
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$127 Roundtrip, found 6 days ago
$127
Roundtrip
found 6 days ago
Select United flight, departing Fri, Dec 25 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 30, priced at $127 found 6 days ago
Tue, Feb 23 - Wed, Mar 3
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$130 Roundtrip, found 1 day ago
$130
Roundtrip
found 1 day ago
Select United flight, departing Tue, Feb 23 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Mar 3, priced at $130 found 1 day ago
Tue, Feb 23 - Tue, Mar 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$134 Roundtrip, found 1 day ago
$134
Roundtrip
found 1 day ago
Select United flight, departing Tue, Feb 23 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Mar 2, priced at $134 found 1 day ago
Tue, Dec 1 - Mon, Dec 7
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$137 Roundtrip, found 5 days ago
$137
Roundtrip
found 5 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Dec 7, priced at $137 found 5 days ago
Tue, Feb 23 - Wed, Mar 3
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$139 Roundtrip, found 1 day ago
$139
Roundtrip
found 1 day ago
Select United flight, departing Tue, Feb 23 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Mar 3, priced at $139 found 1 day ago
Fri, Dec 25 - Tue, Dec 29
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$144 Roundtrip, just found
$144
Roundtrip
just found
Select United flight, departing Fri, Dec 25 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Dec 29, priced at $144 just found
Fri, Dec 25 - Tue, Dec 29
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$150 Roundtrip, just found
$150
Roundtrip
just found
Select United flight, departing Fri, Dec 25 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Dec 29, priced at $150 just found

Frequently asked questions

What route does flight number UA4528 take?
UA4528 flies directly from Portland, ME Airport (PWM-Portland Intl. Jetport) to Newark, NJ Airport (EWR-Liberty Intl.) in approximately 1 hour and 30 minutes. It can sometimes be used on other routes though, some of which could be multi-stop journeys. Keep an eye out for this when booking your seat to avoid any mix-ups.
What kind of plane is on flight number UA4528?
If you've booked a seat on flight UA4528 from Portland, ME Airport (PWM-Portland Intl. Jetport) to Newark, NJ Airport (EWR-Liberty Intl.), you'll most likely be traveling aboard the Canadair (Bombardier) Regional Jet 550. Flight UA4528 serves multiple routes, but this is the busiest.
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 UA4528 flight with Travelocity, please visit our Customer Service Portal.