United Flight 3635 Deals & Information (2026/2027)

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United Flight 3635 Route Deals From $156

The cheapest prices found with in the last 7 days for return flights were $189 and $156 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jun 26 - Mon, Jun 29
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$189 Roundtrip, found 2 days ago
$189
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jun 26 from Washington Dulles Intl. to Portland Intl. Jetport, returning Mon, Jun 29, priced at $189 found 2 days ago
Sun, Jun 28 - Thu, Jul 9
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$198 Roundtrip, found 2 days ago
$198
Roundtrip
found 2 days ago
Select United flight, departing Sun, Jun 28 from Washington Dulles Intl. to Portland Intl. Jetport, returning Thu, Jul 9, priced at $198 found 2 days ago
Sun, Jun 28 - Thu, Jul 9
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$199 Roundtrip, found 2 days ago
$199
Roundtrip
found 2 days ago
Select United flight, departing Sun, Jun 28 from Washington Dulles Intl. to Portland Intl. Jetport, returning Thu, Jul 9, priced at $199 found 2 days ago
Sat, Jun 6 - Sat, Jun 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$202 Roundtrip, found 4 days ago
$202
Roundtrip
found 4 days ago
Select United flight, departing Sat, Jun 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jun 13, priced at $202 found 4 days ago
Fri, Jun 26 - Fri, Jul 3
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$220 Roundtrip, found 5 days ago
$220
Roundtrip
found 5 days ago
Select United flight, departing Fri, Jun 26 from Washington Dulles Intl. to Portland Intl. Jetport, returning Fri, Jul 3, priced at $220 found 5 days ago
Wed, Mar 4 - Sat, Mar 7
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$221 Roundtrip, found 4 days ago
$221
Roundtrip
found 4 days ago
Select United flight, departing Wed, Mar 4 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Mar 7, priced at $221 found 4 days ago
Mon, Jul 6 - Thu, Jul 16
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$224 Roundtrip, found 3 days ago
$224
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jul 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Thu, Jul 16, priced at $224 found 3 days ago
Sat, Jun 6 - Sat, Jun 13
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$225 Roundtrip, found 4 days ago
$225
Roundtrip
found 4 days ago
Select United flight, departing Sat, Jun 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Sat, Jun 13, priced at $225 found 4 days ago
Mon, Jul 6 - Thu, Jul 16
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$229 Roundtrip, found 3 days ago
$229
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jul 6 from Washington Dulles Intl. to Portland Intl. Jetport, returning Thu, Jul 16, priced at $229 found 3 days ago
Fri, Jun 26 - Mon, Jun 29
IAD
Washington Dulles Intl.
PWM
Portland Intl. Jetport
$230 Roundtrip, found 2 days ago
$230
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jun 26 from Washington Dulles Intl. to Portland Intl. Jetport, returning Mon, Jun 29, priced at $230 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.