United Flight 3599 Deals & Information (2026/2027)

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United Flight 3599 Route Deals From $90

The cheapest prices found with in the last 7 days for return flights were $177 and $90 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Aug 10 - Wed, Aug 12
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$177 Roundtrip, found 1 day ago
$177
Roundtrip
found 1 day ago
Select United flight, departing Mon, Aug 10 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Aug 12, priced at $177 found 1 day ago
Mon, Jun 8 - Thu, Jun 11
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$186 Roundtrip, found 2 days ago
$186
Roundtrip
found 2 days ago
Select United flight, departing Mon, Jun 8 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Jun 11, priced at $186 found 2 days ago
Tue, Jun 2 - Wed, Jun 3
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$192 Roundtrip, found 8 hours ago
$192
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Jun 2 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Jun 3, priced at $192 found 8 hours ago
Mon, Jul 20 - Fri, Jul 24
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$194 Roundtrip, found 7 hours ago
$194
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Jul 20 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Fri, Jul 24, priced at $194 found 7 hours ago
Sun, Jul 5 - Thu, Jul 9
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select United flight, departing Sun, Jul 5 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Jul 9, priced at $197 found 2 days ago
Wed, Aug 12 - Fri, Aug 14
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$197 Roundtrip, found 1 day ago
$197
Roundtrip
found 1 day ago
Select United flight, departing Wed, Aug 12 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Fri, Aug 14, priced at $197 found 1 day ago
Mon, Jun 8 - Thu, Jun 11
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$202 Roundtrip, found 2 days ago
$202
Roundtrip
found 2 days ago
Select United flight, departing Mon, Jun 8 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Jun 11, priced at $202 found 2 days ago
Sat, May 23 - Thu, May 28
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$207 Roundtrip, found 6 days ago
$207
Roundtrip
found 6 days ago
Select United flight, departing Sat, May 23 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, May 28, priced at $207 found 6 days ago
Mon, Aug 10 - Wed, Aug 12
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$208 Roundtrip, found 1 day ago
$208
Roundtrip
found 1 day ago
Select United flight, departing Mon, Aug 10 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Aug 12, priced at $208 found 1 day ago
Mon, Aug 17 - Fri, Aug 21
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$213 Roundtrip, found 5 days ago
$213
Roundtrip
found 5 days ago
Select United flight, departing Mon, Aug 17 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Fri, Aug 21, priced at $213 found 5 days ago

Frequently asked questions

What route does flight number UA3599 take?
UA3599 is used on multiple routes, but the most common is between Raleigh, NC Airport (RDU-Raleigh - Durham Intl.) and ORD. If you're lucky enough to score a direct flight, you'll disembark the plane in 2 hours and 21 minutes. Multi-stop flights can also travel under the same number, as can flights on other routes.
What terminal does UA3599 fly out of?
You'll likely depart from Terminal 2 if you're setting off from Raleigh–Durham Airport. UA3599 serves multiple routes, but the direct flight between Raleigh, NC Airport (RDU-Raleigh - Durham Intl.) and Chicago, IL Airport (ORD-O'Hare Intl.) is the most popular.
What kind of plane is on flight number UA3599?
There's every chance you'll be taking off on an Embraer 175 if you're jetting from Raleigh, NC Airport (RDU-Raleigh - Durham Intl.) to O'Hare Intl. Airport (ORD), a popular route for flight UA3599.
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 UA3599 flight with Travelocity, please visit our Customer Service Portal.