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 $142 and $89 for one-way flights to Portland Intl. Jetport for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, May 8 - Tue, May 12
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$142 Roundtrip, found 5 days ago
$142
Roundtrip
found 5 days ago
Select United flight, departing Fri, May 8 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, May 12, priced at $142 found 5 days ago
Fri, May 8 - Tue, May 12
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$161 Roundtrip, found 5 days ago
$161
Roundtrip
found 5 days ago
Select United flight, departing Fri, May 8 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, May 12, priced at $161 found 5 days ago
Wed, Aug 19 - Fri, Aug 21
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$192 Roundtrip, found 4 days ago
$192
Roundtrip
found 4 days ago
Select United flight, departing Wed, Aug 19 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Fri, Aug 21, priced at $192 found 4 days ago
Sat, Apr 18 - Tue, Apr 21
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$195 Roundtrip, found 3 days ago
$195
Roundtrip
found 3 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 3 days ago
Fri, May 8 - Tue, May 12
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$204 Roundtrip, found 5 days ago
$204
Roundtrip
found 5 days ago
Select United flight, departing Fri, May 8 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, May 12, priced at $204 found 5 days ago
Sat, Sep 5 - Thu, Sep 10
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$206 Roundtrip, found 4 days ago
$206
Roundtrip
found 4 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 4 days ago
Tue, Jun 23 - Wed, Jun 24
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 Tue, Jun 23 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Wed, Jun 24, priced at $207 found 6 days ago
Mon, Aug 17 - Sat, Aug 22
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$212 Roundtrip, found 3 days ago
$212
Roundtrip
found 3 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 3 days ago
Fri, Mar 20 - Mon, Mar 23
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$220 Roundtrip, found 5 days ago
$220
Roundtrip
found 5 days ago
Select United flight, departing Fri, Mar 20 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Mon, Mar 23, priced at $220 found 5 days ago
Fri, May 8 - Tue, May 12
EWR
Newark Liberty Intl. Airport
PWM
Portland Intl. Jetport
$223 Roundtrip, found 5 days ago
$223
Roundtrip
found 5 days ago
Select United flight, departing Fri, May 8 from Newark Liberty Intl. Airport to Portland Intl. Jetport, returning Tue, May 12, priced at $223 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.