United Flight NK664 Deals & Information (2025/2026)

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United Flight 664 Route Deals From $82

The cheapest prices found with in the last 7 days for return flights were $143 and $82 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Aug 22 - Sun, Aug 31
LAS
Harry Reid Intl.
ORD
O'Hare Intl.
$143 Roundtrip, found 1 hour ago
$143
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Aug 22 from Harry Reid Intl. to O'Hare Intl., returning Sun, Aug 31, priced at $143 found 1 hour ago

Frequently asked questions

What route does flight number UA664 take?
You'll be arriving into O'Hare Airport from Las Vegas, NV Airport (LAS-McCarran Intl.) if you're traveling on flight number UA664. You'll be in the sky for 3 hours and 40 minutes during this trip. What's more, the flight conveniently operates non-stop.
What terminal does UA664 fly out of?
Passengers with seats on flight number UA664 from McCarran Airport to O'Hare Intl. Airport (ORD) generally fly out of Terminal 3.
What kind of plane is on flight number UA664?
There's a good chance you'll find yourself cruising aboard the Boeing 737-900 if you're on flight UA664. This flight almost always heads off from McCarran Airport and touches down at O'Hare Airport.
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 UA664 flight with Travelocity, please visit our Customer Service Portal.