$84 Cheap United flights Seattle (SEA) to Las Vegas (LAS)

View $84 flight on Thu, Sep 4, 2025Opens in a new window

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$84 Cheap United flights Seattle (SEA) to Las Vegas (LAS)

Prices were available within the past 7 days and start at $84 for one-way flights and $164 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Aug 25 - Wed, Aug 27
SEA
Seattle
LAS
Las Vegas
$164 Roundtrip, found 2 hours ago
$164
Roundtrip
found 2 hours ago
Select United flight, departing Mon, Aug 25 from Seattle to Las Vegas, returning Wed, Aug 27, priced at $164 found 2 hours ago
United
Mon, Oct 13 - Thu, Oct 16
SEA
Seattle
LAS
Las Vegas
$192 Roundtrip, found 1 hour ago
$192
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Oct 13 from Seattle to Las Vegas, returning Thu, Oct 16, priced at $192 found 1 hour ago
Flights from Seattle (SEA) to Las Vegas (LAS)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Harry Reid Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, United
Popular airline
Alaska Airlines
Distance
866 mi
Average flight time
2 hours 33 mins

Frequently asked questions

How much is a United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Harry Reid Intl. Airport (LAS)?
You can find affordable round-trip United Airlines flights from $164 from SEA to LAS by sorting your results from "Price (lowest to highest)" on Expedia. Or search for options from $84 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SEA to LAS with United Airlines?
United Airlines flights to Las Vegas are typically more affordable in the low-season months of January and June. Whether you're searching for a one-way or round-trip ticket, you could find a better deal then.
What is the cheapest time to book flights from Seattle - Tacoma Intl. Airport (SEA) to Harry Reid Intl. Airport (LAS) with United Airlines?
Start searching one to three months ahead of your travel date to find cheap fares on United Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Harry Reid Intl. Airport (LAS). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to Harry Reid Intl. Airport (LAS)?
Click on the "Nonstop" filter when searching for direct United Airlines flights from SEA to LAS. You can also compare other carriers servicing the same nonstop route.
What is the earliest United Airlines flight from SEA to LAS?
Browse United Airlines's earliest flights from SEA to LAS by selecting our "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Las Vegas?
Harry Reid Intl. Airport (LAS) is the primary Las Vegas gateway for United Airlines flights from Seattle - Tacoma Intl. Airport (SEA).
Why fly with United Airlines from SEA to LAS?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to depart from SEA to LAS with United Airlines. Plus, when you join Expedia's free One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Harry Reid Intl. Airport (LAS)?
It's usually possible to cancel or change your flight, although there may be additional fees if you booked over 24 hours ago. Need to keep your options open? Use our "No cancel fee" and "Changes included" filters to find flights that won't penalize you if you have to revise your plans. To modify your booking, visit "Trips," select your flight and click on "Manage Booking" for more information.

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*Available to One Key members.