United Flight 661 Deals & Information (2026/2027)

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United Flight 661 Route Deals From $97

The cheapest prices found with in the last 7 days for return flights were $192 and $97 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jul 25 - Tue, Jul 28
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$192 Roundtrip, found 11 hours ago
$192
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Jul 25 from Newark Liberty Intl. Airport to O'Hare Intl., returning Tue, Jul 28, priced at $192 found 11 hours ago
Sun, Sep 13 - Wed, Sep 16
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$192 Roundtrip, found 17 hours ago
$192
Roundtrip
found 17 hours ago
Select United flight, departing Sun, Sep 13 from Newark Liberty Intl. Airport to O'Hare Intl., returning Wed, Sep 16, priced at $192 found 17 hours ago
Thu, Sep 3 - Wed, Sep 9
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$195 Roundtrip, found 2 days ago
$195
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 3 from Newark Liberty Intl. Airport to O'Hare Intl., returning Wed, Sep 9, priced at $195 found 2 days ago
Fri, Oct 23 - Sun, Oct 25
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$197 Roundtrip, just found
$197
Roundtrip
just found
Select United flight, departing Fri, Oct 23 from Newark Liberty Intl. Airport to O'Hare Intl., returning Sun, Oct 25, priced at $197 just found
Thu, Sep 3 - Thu, Sep 10
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$202 Roundtrip, found 22 hours ago
$202
Roundtrip
found 22 hours ago
Select United flight, departing Thu, Sep 3 from Newark Liberty Intl. Airport to O'Hare Intl., returning Thu, Sep 10, priced at $202 found 22 hours ago
Wed, Oct 7 - Sat, Oct 10
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$203 Roundtrip, found 23 hours ago
$203
Roundtrip
found 23 hours ago
Select United flight, departing Wed, Oct 7 from Newark Liberty Intl. Airport to O'Hare Intl., returning Sat, Oct 10, priced at $203 found 23 hours ago
Fri, Sep 18 - Tue, Sep 22
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$205 Roundtrip, found 1 day ago
$205
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 18 from Newark Liberty Intl. Airport to O'Hare Intl., returning Tue, Sep 22, priced at $205 found 1 day ago
Wed, Sep 9 - Fri, Sep 11
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$206 Roundtrip, found 4 days ago
$206
Roundtrip
found 4 days ago
Select United flight, departing Wed, Sep 9 from Newark Liberty Intl. Airport to O'Hare Intl., returning Fri, Sep 11, priced at $206 found 4 days ago
Thu, Sep 17 - Sat, Sep 19
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$208 Roundtrip, found 2 days ago
$208
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 17 from Newark Liberty Intl. Airport to O'Hare Intl., returning Sat, Sep 19, priced at $208 found 2 days ago
Fri, Oct 23 - Sun, Oct 25
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$210 Roundtrip, just found
$210
Roundtrip
just found
Select United flight, departing Fri, Oct 23 from Newark Liberty Intl. Airport to O'Hare Intl., returning Sun, Oct 25, priced at $210 just found
Sat, Jul 25 - Tue, Jul 28
EWR
Newark Liberty Intl. Airport
ORD
O'Hare Intl.
$211 Roundtrip, found 11 hours ago
$211
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Jul 25 from Newark Liberty Intl. Airport to O'Hare Intl., returning Tue, Jul 28, priced at $211 found 11 hours ago

Frequently asked questions

What route does flight number UA661 take?
UA661 takes a few routes. The most popular is between Raleigh–Durham Airport and DIA airport, which flies direct. This flight takes roughly 3 hours and 45 minutes. That said, there may possibly be other flights with this number that have one or more stops.
What terminal does UA661 fly out of?
If you're leaving from Raleigh–Durham Airport, you'll probably board the aircraft from Terminal 2. The most traveled route for UA661 is Raleigh, NC Airport (RDU-Raleigh - Durham Intl.) to Denver Intl. Airport (DEN), which is a nonstop flight.
What kind of plane is on flight number UA661?
UA661 is a flight number that is used on many routes. If you have a ticket on the most common route, Raleigh, NC Airport (RDU-Raleigh - Durham Intl.) to DEN, you'll probably be boarding an Airbus A319.
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 UA661 flight with Travelocity, please visit our Customer Service Portal.