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 $249 and $141 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jul 11 - Sat, Jul 18
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$249 Roundtrip, just found
$249
Roundtrip
just found
Select United flight, departing Sat, Jul 11 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jul 18, priced at $249 just found
Fri, May 29 - Mon, Jun 1
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$254 Roundtrip, found 1 day ago
$254
Roundtrip
found 1 day ago
Select United flight, departing Fri, May 29 from Washington Dulles Intl. to Portland Intl. Jetport, returning Mon, Jun 1, priced at $254 found 1 day ago
Sat, Jun 6 - Sat, Jun 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$256 Roundtrip, found 8 hours ago
$256
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Jun 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jun 13, priced at $256 found 8 hours ago
Sun, Jun 28 - Tue, Jul 7
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$264 Roundtrip, found 13 hours ago
$264
Roundtrip
found 13 hours ago
Select United flight, departing Sun, Jun 28 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, Jul 7, priced at $264 found 13 hours ago
Sat, Jun 6 - Sat, Jun 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$266 Roundtrip, found 8 hours ago
$266
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Jun 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jun 13, priced at $266 found 8 hours ago
Tue, Jun 30 - Fri, Jul 3
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$273 Roundtrip, found 5 days ago
$273
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 30 from Washington Dulles Intl. to Portland Intl. Jetport, returning Fri, Jul 3, priced at $273 found 5 days ago
Sat, Jun 6 - Sat, Jun 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$281 Roundtrip, found 8 hours ago
$281
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Jun 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jun 13, priced at $281 found 8 hours ago
Tue, May 12 - Wed, May 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$283 Roundtrip, found 5 days ago
$283
Roundtrip
found 5 days ago
Select United flight, departing Tue, May 12 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, May 13, priced at $283 found 5 days ago
Tue, Jun 30 - Fri, Jul 3
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$283 Roundtrip, found 5 days ago
$283
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 30 from Washington Dulles Intl. to Portland Intl. Jetport, returning Fri, Jul 3, priced at $283 found 5 days ago
Fri, May 29 - Mon, Jun 1
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$286 Roundtrip, found 1 day ago
$286
Roundtrip
found 1 day ago
Select United flight, departing Fri, May 29 from Washington Dulles Intl. to Portland Intl. Jetport, returning Mon, Jun 1, priced at $286 found 1 day 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.