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 $139 and $59 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Dec 1 - Wed, Dec 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$139 Roundtrip, found 4 days ago
$139
Roundtrip
found 4 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 2, priced at $139 found 4 days ago
Tue, Dec 1 - Wed, Dec 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$145 Roundtrip, found 4 days ago
$145
Roundtrip
found 4 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 2, priced at $145 found 4 days ago
Tue, Dec 22 - Tue, Jan 5
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$147 Roundtrip, found 5 days ago
$147
Roundtrip
found 5 days ago
Select United flight, departing Tue, Dec 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Jan 5, priced at $147 found 5 days ago
Tue, Dec 22 - Tue, Jan 5
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$151 Roundtrip, found 5 days ago
$151
Roundtrip
found 5 days ago
Select United flight, departing Tue, Dec 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Jan 5, priced at $151 found 5 days ago
Tue, Dec 1 - Wed, Dec 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$166 Roundtrip, found 4 days ago
$166
Roundtrip
found 4 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 2, priced at $166 found 4 days ago
Tue, Dec 1 - Wed, Dec 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$171 Roundtrip, found 4 days ago
$171
Roundtrip
found 4 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 2, priced at $171 found 4 days ago
Tue, Dec 1 - Wed, Dec 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$188 Roundtrip, found 4 days ago
$188
Roundtrip
found 4 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 2, priced at $188 found 4 days ago
Tue, Dec 1 - Wed, Dec 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$214 Roundtrip, found 4 days ago
$214
Roundtrip
found 4 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 2, priced at $214 found 4 days ago
Fri, Jan 15 - Mon, Jan 18
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$225 Roundtrip, found 2 days ago
$225
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jan 15 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Jan 18, priced at $225 found 2 days ago
Tue, Dec 1 - Wed, Dec 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$229 Roundtrip, found 4 days ago
$229
Roundtrip
found 4 days ago
Select United flight, departing Tue, Dec 1 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Dec 2, priced at $229 found 4 days ago

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.