United Flight 3599 Deals & Information (2026/2027)

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United Flight 3599 Route Deals From $54

The cheapest prices found with in the last 7 days for return flights were $110 and $54 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Mar 19 - Sun, Mar 22
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$110 Roundtrip, just found
$110
Roundtrip
just found
Select United flight, departing Thu, Mar 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sun, Mar 22, priced at $110 just found
Mon, Jun 1 - Wed, Jun 10
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$147 Roundtrip, found 3 days ago
$147
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jun 1 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Jun 10, priced at $147 found 3 days ago
Wed, Feb 11 - Sat, Feb 14
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$149 Roundtrip, found 5 days ago
$149
Roundtrip
found 5 days ago
Select United flight, departing Wed, Feb 11 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sat, Feb 14, priced at $149 found 5 days ago
Thu, Feb 12 - Sun, Feb 15
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$151 Roundtrip, found 5 days ago
$151
Roundtrip
found 5 days ago
Select United flight, departing Thu, Feb 12 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sun, Feb 15, priced at $151 found 5 days ago
Tue, Feb 3 - Sat, Feb 7
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$164 Roundtrip, found 5 days ago
$164
Roundtrip
found 5 days ago
Select United flight, departing Tue, Feb 3 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sat, Feb 7, priced at $164 found 5 days ago
Mon, Jun 1 - Wed, Jun 10
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$168 Roundtrip, found 3 days ago
$168
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jun 1 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Jun 10, priced at $168 found 3 days ago
Wed, Jul 15 - Wed, Jul 22
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$169 Roundtrip, found 8 hours ago
$169
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Jul 15 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Jul 22, priced at $169 found 8 hours ago
Thu, Feb 19 - Sun, Feb 22
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$170 Roundtrip, found 1 day ago
$170
Roundtrip
found 1 day ago
Select United flight, departing Thu, Feb 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sun, Feb 22, priced at $170 found 1 day ago
Thu, Mar 19 - Sun, Mar 22
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$171 Roundtrip, just found
$171
Roundtrip
just found
Select United flight, departing Thu, Mar 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sun, Mar 22, priced at $171 just found
Sat, Mar 7 - Fri, Mar 13
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$179 Roundtrip, found 5 days ago
$179
Roundtrip
found 5 days ago
Select United flight, departing Sat, Mar 7 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Fri, Mar 13, priced at $179 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.