United Flight 3599 Deals & Information (2026/2027)

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United Flight 3599 Route Deals From $89

The cheapest prices found with in the last 7 days for return flights were $191 and $89 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, May 10 - Sun, May 17
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$191 Roundtrip, found 21 hours ago
$191
Roundtrip
found 21 hours ago
Select United flight, departing Sun, May 10 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sun, May 17, priced at $191 found 21 hours ago
Tue, Jul 28 - Tue, Aug 4
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$192 Roundtrip, found 1 hour ago
$192
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Jul 28 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, Aug 4, priced at $192 found 1 hour ago
Sat, Apr 18 - Tue, Apr 21
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$195 Roundtrip, found 5 days ago
$195
Roundtrip
found 5 days ago
Select United flight, departing Sat, Apr 18 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, Apr 21, priced at $195 found 5 days ago
Mon, Jul 13 - Tue, Jul 21
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Jul 13 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, Jul 21, priced at $197 found 1 hour ago
Sat, Sep 5 - Thu, Sep 10
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$206 Roundtrip, found 6 days ago
$206
Roundtrip
found 6 days ago
Select United flight, departing Sat, Sep 5 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Thu, Sep 10, priced at $206 found 6 days ago
Mon, Aug 17 - Sat, Aug 22
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$212 Roundtrip, found 5 days ago
$212
Roundtrip
found 5 days ago
Select United flight, departing Mon, Aug 17 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sat, Aug 22, priced at $212 found 5 days ago
Mon, Jul 20 - Tue, Jul 28
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$218 Roundtrip, found 1 hour ago
$218
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Jul 20 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, Jul 28, priced at $218 found 1 hour ago
Sun, May 10 - Sun, May 17
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$227 Roundtrip, found 21 hours ago
$227
Roundtrip
found 21 hours ago
Select United flight, departing Sun, May 10 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sun, May 17, priced at $227 found 21 hours ago
Wed, Jun 17 - Sat, Jun 20
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$230 Roundtrip, found 5 days ago
$230
Roundtrip
found 5 days ago
Select United flight, departing Wed, Jun 17 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Sat, Jun 20, priced at $230 found 5 days ago
Wed, Aug 19 - Fri, Aug 21
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$232 Roundtrip, found 6 days ago
$232
Roundtrip
found 6 days ago
Select United flight, departing Wed, Aug 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Fri, Aug 21, priced at $232 found 6 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.