United Flight 3635 Deals & Information (2026/2027)

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United Flight 3635 Route Deals From $124

The cheapest prices found with in the last 7 days for return flights were $189 and $124 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jun 6 - Sat, Jun 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$189 Roundtrip, found 6 hours ago
$189
Roundtrip
found 6 hours ago
Select United flight, departing Sat, Jun 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jun 13, priced at $189 found 6 hours ago
Sun, May 3 - Sat, May 9
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$191 Roundtrip, found 4 days ago
$191
Roundtrip
found 4 days ago
Select United flight, departing Sun, May 3 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, May 9, priced at $191 found 4 days ago
Tue, Mar 31 - Tue, Apr 7
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$194 Roundtrip, found 6 days ago
$194
Roundtrip
found 6 days ago
Select United flight, departing Tue, Mar 31 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, Apr 7, priced at $194 found 6 days ago
Wed, May 13 - Sat, May 23
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$198 Roundtrip, found 5 days ago
$198
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 13 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, May 23, priced at $198 found 5 days ago
Sat, Jun 6 - Sat, Jun 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$204 Roundtrip, found 6 hours ago
$204
Roundtrip
found 6 hours ago
Select United flight, departing Sat, Jun 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jun 13, priced at $204 found 6 hours ago
Wed, Mar 4 - Sat, Mar 7
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$205 Roundtrip, found 3 days ago
$205
Roundtrip
found 3 days ago
Select United flight, departing Wed, Mar 4 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Mar 7, priced at $205 found 3 days ago
Wed, May 13 - Sat, May 23
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$213 Roundtrip, found 5 days ago
$213
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 13 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, May 23, priced at $213 found 5 days ago
Mon, Mar 23 - Mon, Mar 30
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$214 Roundtrip, found 21 hours ago
$214
Roundtrip
found 21 hours ago
Select United flight, departing Mon, Mar 23 from Washington Dulles Intl. to Portland Intl. Jetport, returning Mon, Mar 30, priced at $214 found 21 hours ago
Mon, Jun 22 - Wed, Jul 1
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$219 Roundtrip, found 4 days ago
$219
Roundtrip
found 4 days ago
Select United flight, departing Mon, Jun 22 from Washington Dulles Intl. to Portland Intl. Jetport, returning Wed, Jul 1, priced at $219 found 4 days ago
Sat, Feb 28 - Tue, Mar 3
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$221 Roundtrip, found 2 days ago
$221
Roundtrip
found 2 days ago
Select United flight, departing Sat, Feb 28 from Washington Dulles Intl. to Portland Intl. Jetport, returning Tue, Mar 3, priced at $221 found 2 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.