United Flight 3599 Deals & Information (2026/2027)

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United Flight 3599 Route Deals From $76

The cheapest prices found with in the last 7 days for return flights were $153 and $76 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 28 - Sat, Aug 1
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$153 Roundtrip, found 1 day ago
$153
Roundtrip
found 1 day ago
Select United flight, departing Tue, Jul 28 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sat, Aug 1, priced at $153 found 1 day ago
Tue, Aug 25 - Thu, Aug 27
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$157 Roundtrip, found 2 days ago
$157
Roundtrip
found 2 days ago
Select United flight, departing Tue, Aug 25 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Aug 27, priced at $157 found 2 days ago
Sun, Jul 19 - Thu, Jul 23
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$169 Roundtrip, found 7 hours ago
$169
Roundtrip
found 7 hours ago
Select United flight, departing Sun, Jul 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Jul 23, priced at $169 found 7 hours ago
Mon, Jul 20 - Wed, Jul 22
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$174 Roundtrip, found 11 hours ago
$174
Roundtrip
found 11 hours ago
Select United flight, departing Mon, Jul 20 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Jul 22, priced at $174 found 11 hours ago
Sun, Aug 2 - Tue, Aug 4
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$178 Roundtrip, found 3 days ago
$178
Roundtrip
found 3 days ago
Select United flight, departing Sun, Aug 2 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, Aug 4, priced at $178 found 3 days ago
Tue, Aug 25 - Thu, Aug 27
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$179 Roundtrip, found 2 days ago
$179
Roundtrip
found 2 days ago
Select United flight, departing Tue, Aug 25 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Aug 27, priced at $179 found 2 days ago
Sun, Aug 16 - Wed, Aug 26
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$181 Roundtrip, found 6 hours ago
$181
Roundtrip
found 6 hours ago
Select United flight, departing Sun, Aug 16 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Aug 26, priced at $181 found 6 hours ago
Sat, Sep 19 - Thu, Sep 24
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$181 Roundtrip, found 2 days ago
$181
Roundtrip
found 2 days ago
Select United flight, departing Sat, Sep 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Sep 24, priced at $181 found 2 days ago
Sun, Jul 19 - Fri, Jul 24
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$182 Roundtrip, found 3 days ago
$182
Roundtrip
found 3 days ago
Select United flight, departing Sun, Jul 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Fri, Jul 24, priced at $182 found 3 days ago
Tue, Jul 14 - Tue, Jul 21
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$183 Roundtrip, found 13 hours ago
$183
Roundtrip
found 13 hours ago
Select United flight, departing Tue, Jul 14 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, Jul 21, priced at $183 found 13 hours 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.