United Flight 3599 Deals & Information (2026/2027)

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United Flight 3599 Route Deals From $289

The cheapest prices found with in the last 7 days for return flights were $339 and $289 for one-way flights to Louisville Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Mar 3 - Sun, Mar 7
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$339 Roundtrip, found 10 hours ago
$339
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Mar 3 from Newark Liberty Intl. Airport to Louisville Intl., returning Sun, Mar 7, priced at $339 found 10 hours ago
Wed, Mar 3 - Sun, Mar 7
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$349 Roundtrip, found 10 hours ago
$349
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Mar 3 from Newark Liberty Intl. Airport to Louisville Intl., returning Sun, Mar 7, priced at $349 found 10 hours ago
Wed, Nov 11 - Sat, Nov 14
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$356 Roundtrip, found 10 hours ago
$356
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Nov 11 from Newark Liberty Intl. Airport to Louisville Intl., returning Sat, Nov 14, priced at $356 found 10 hours ago
Fri, Dec 4 - Sat, Dec 5
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$361 Roundtrip, found 2 days ago
$361
Roundtrip
found 2 days ago
Select United flight, departing Fri, Dec 4 from Newark Liberty Intl. Airport to Louisville Intl., returning Sat, Dec 5, priced at $361 found 2 days ago
Sat, May 29 - Sun, May 30
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$370 Roundtrip, found 3 days ago
$370
Roundtrip
found 3 days ago
Select United flight, departing Sat, May 29 from Newark Liberty Intl. Airport to Louisville Intl., returning Sun, May 30, priced at $370 found 3 days ago
Thu, Nov 19 - Sun, Nov 22
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$376 Roundtrip, found 2 days ago
$376
Roundtrip
found 2 days ago
Select United flight, departing Thu, Nov 19 from Newark Liberty Intl. Airport to Louisville Intl., returning Sun, Nov 22, priced at $376 found 2 days ago
Sat, May 29 - Sun, May 30
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$378 Roundtrip, found 3 days ago
$378
Roundtrip
found 3 days ago
Select United flight, departing Sat, May 29 from Newark Liberty Intl. Airport to Louisville Intl., returning Sun, May 30, priced at $378 found 3 days ago
Tue, Nov 24 - Tue, Dec 1
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$379 Roundtrip, found 10 hours ago
$379
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Nov 24 from Newark Liberty Intl. Airport to Louisville Intl., returning Tue, Dec 1, priced at $379 found 10 hours ago
Thu, Dec 17 - Sun, Dec 20
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$383 Roundtrip, found 1 day ago
$383
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 17 from Newark Liberty Intl. Airport to Louisville Intl., returning Sun, Dec 20, priced at $383 found 1 day ago
Thu, Nov 19 - Sun, Nov 22
EWR
Newark Liberty Intl. Airport
SDF
Louisville Intl.
$385 Roundtrip, found 2 days ago
$385
Roundtrip
found 2 days ago
Select United flight, departing Thu, Nov 19 from Newark Liberty Intl. Airport to Louisville Intl., returning Sun, Nov 22, priced at $385 found 2 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.