United Flight 4508 Deals & Information (2026/2027)

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United Flight 4508 Route Deals From $141

The cheapest prices found with in the last 7 days for return flights were $254 and $141 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, May 12 - Tue, May 19
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$254 Roundtrip, found 3 days ago
$254
Roundtrip
found 3 days ago
Select United flight, departing Tue, May 12 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 19, priced at $254 found 3 days ago
Tue, May 12 - Tue, May 19
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$268 Roundtrip, found 3 days ago
$268
Roundtrip
found 3 days ago
Select United flight, departing Tue, May 12 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 19, priced at $268 found 3 days ago
Wed, Aug 12 - Wed, Aug 19
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$269 Roundtrip, found 2 days ago
$269
Roundtrip
found 2 days ago
Select United flight, departing Wed, Aug 12 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, Aug 19, priced at $269 found 2 days ago
Tue, Jun 30 - Fri, Jul 3
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$273 Roundtrip, found 10 hours ago
$273
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Jun 30 from Washington Dulles Intl. to Portland Intl. Jetport, returning Fri, Jul 3, priced at $273 found 10 hours ago
Wed, May 13 - Wed, May 20
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$274 Roundtrip, found 9 hours ago
$274
Roundtrip
found 9 hours ago
Select United flight, departing Wed, May 13 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, May 20, priced at $274 found 9 hours ago
Tue, May 12 - Tue, May 19
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$278 Roundtrip, found 3 days ago
$278
Roundtrip
found 3 days ago
Select United flight, departing Tue, May 12 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 19, priced at $278 found 3 days ago
Wed, Aug 12 - Wed, Aug 19
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$279 Roundtrip, found 2 days ago
$279
Roundtrip
found 2 days ago
Select United flight, departing Wed, Aug 12 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, Aug 19, priced at $279 found 2 days ago
Tue, May 12 - Wed, May 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$283 Roundtrip, found 13 hours ago
$283
Roundtrip
found 13 hours ago
Select United flight, departing Tue, May 12 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, May 13, priced at $283 found 13 hours ago
Tue, Jun 30 - Fri, Jul 3
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$283 Roundtrip, found 10 hours ago
$283
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Jun 30 from Washington Dulles Intl. to Portland Intl. Jetport, returning Fri, Jul 3, priced at $283 found 10 hours ago
Wed, May 13 - Wed, May 20
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$284 Roundtrip, found 9 hours ago
$284
Roundtrip
found 9 hours ago
Select United flight, departing Wed, May 13 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, May 20, priced at $284 found 9 hours ago

Frequently asked questions

What route does flight number UA4508 take?
UA4508 is used on a number of routes. Most often, UA4508 flies straight from STL to Liberty Intl. Airport (EWR). If that's your chosen flight path, you'll be flying for about 2 hours and 19 minutes.
What terminal does UA4508 fly out of?
Terminal 1 is the terminal you'll likely take off from if you're booked on a flight leaving from STL. Lambert Field to Liberty Intl. Airport (EWR) is the most commonly traveled route for flight number UA4508.
What kind of plane is on flight number UA4508?
You'll probably be traveling aboard the Canadair (Bombardier) Regional Jet 550 if you're on flight number UA4508 from STL to Liberty Intl. Airport (EWR). This is the most commonly used type of aircraft on this particular route.
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 UA4508 flight with Travelocity, please visit our Customer Service Portal.