United Flight 3635 Deals & Information (2026/2027)

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United Flight 3635 Route Deals From $119

The cheapest prices found with in the last 7 days for return flights were $189 and $119 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, May 8 - Tue, May 12
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$189 Roundtrip, found 23 hours ago
$189
Roundtrip
found 23 hours ago
Select United flight, departing Fri, May 8 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 12, priced at $189 found 23 hours ago
Wed, May 13 - Sat, May 16
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$195 Roundtrip, found 3 days ago
$195
Roundtrip
found 3 days ago
Select United flight, departing Wed, May 13 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, May 16, priced at $195 found 3 days ago
Fri, May 8 - Tue, May 12
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$199 Roundtrip, found 23 hours ago
$199
Roundtrip
found 23 hours ago
Select United flight, departing Fri, May 8 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 12, priced at $199 found 23 hours ago
Wed, May 13 - Sat, May 16
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$204 Roundtrip, found 3 days ago
$204
Roundtrip
found 3 days ago
Select United flight, departing Wed, May 13 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, May 16, priced at $204 found 3 days ago
Wed, May 13 - Sat, May 16
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$210 Roundtrip, found 3 days ago
$210
Roundtrip
found 3 days ago
Select United flight, departing Wed, May 13 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, May 16, priced at $210 found 3 days ago
Fri, May 8 - Tue, May 12
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$214 Roundtrip, found 23 hours ago
$214
Roundtrip
found 23 hours ago
Select United flight, departing Fri, May 8 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 12, priced at $214 found 23 hours ago
Fri, Mar 20 - Wed, Mar 25
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$248 Roundtrip, found 4 days ago
$248
Roundtrip
found 4 days ago
Select United flight, departing Fri, Mar 20 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, Mar 25, priced at $248 found 4 days ago
Fri, May 8 - Tue, May 12
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$249 Roundtrip, found 23 hours ago
$249
Roundtrip
found 23 hours ago
Select United flight, departing Fri, May 8 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 12, priced at $249 found 23 hours ago
Fri, May 8 - Tue, May 12
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$259 Roundtrip, found 23 hours ago
$259
Roundtrip
found 23 hours ago
Select United flight, departing Fri, May 8 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, May 12, priced at $259 found 23 hours ago
Wed, Jan 14 - Sun, Jan 18
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$263 Roundtrip, found 4 days ago
$263
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jan 14 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sun, Jan 18, priced at $263 found 4 days ago

Frequently asked questions

What route does flight number UA3635 take?
UA3635 flies direct between Pittsburgh, PA Airport (PIT-Pittsburgh Intl.) and O'Hare Intl. Airport (ORD) in around 1 hour and 35 minutes. It can sometimes be used on other routes though, some of which may be multi-stop flights. Keep an eye out for this when locking in your seat to avoid any confusion.
What kind of plane is on flight number UA3635?
If you're considering booking flight UA3635 from Pittsburgh Intl. Airport (PIT) to ORD, there's a strong chance you'll be traveling aboard the Embraer 175. This flight number serves a number of different 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 UA3635 flight with Travelocity, please visit our Customer Service Portal.