United Flight 1646 Deals & Information (2026/2027)

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United Flight 1646 Route Deals From $196

The cheapest prices found with in the last 7 days for return flights were $425 and $196 for one-way flights to Baltimore Washington Intl. Thurgood Marshall for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 23 - Thu, Dec 31
SFO
San Francisco Intl.
BWI
Baltimore Washington Intl. Thurgood Marshall
$425 Roundtrip, found 1 hour ago
$425
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Dec 23 from San Francisco Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Thu, Dec 31, priced at $425 found 1 hour ago

Frequently asked questions

What route does flight number UA1646 take?
UA1646 operates directly from Houston Airport to Las Vegas, NV Airport (LAS-McCarran Intl.). During this journey, you can expect to be in the air for approximately 3 hours and 18 minutes. It pays to book ahead to secure your favorite seat.
How often is UA1646 on time?
United Airlines flight number UA1646 from Houston Airport to McCarran Intl. Airport (LAS) leaves according to schedule 85% of the time — so you can relaxing knowing you'll arrive at your destination ASAP. If your flight happens to be late, the average wait is approximately 11 minutes. This route has a star rating of 3.65.
What terminal does UA1646 fly out of?
Travelers with seats booked on flight number UA1646 from George Bush Intercontinental Airport (IAH) to McCarran Airport usually board the plane from Terminal C.
What kind of plane is on flight number UA1646?
You're likely to find yourself hopping on board a Boeing 737-800 if you're on flight UA1646. This flight almost always heads off from IAH and arrives at McCarran 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 UA1646 flight with Travelocity, please visit our Customer Service Portal.