Route guide · 2,061 miles
Cheap Flights from Washington to Las Vegas
IAD → LAS · Nonstop 4h 41m · Live round-trip fares
Looking for cheap flights from Washington to Las Vegas? You're in the right place. Flyzento tracks live fares on this 2,061-mile route around the clock. As a rule of thumb, booking 4–8 weeks ahead lands the best prices — and a free fare alert means you never have to keep refreshing the page.
Live fares for IAD → LAS are updating. Use the search below for real-time prices.
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Updated daily
Flight time
4h 41m
Nonstop, typical
Distance
2,061 mi
IAD → LAS
Cheapest month
December 2026
Fares from $54
Nonstop airlines
1
United Airlines
Nonstop flights from Washington to Las Vegas
Nonstop service links Washington and Las Vegas directly — flights are flown by United Airlines. Expect roughly 4h 41m in the air. If a nonstop is what you want, don't wait too long: booking 4–8 weeks ahead is when these seats are priced most kindly.
Booking insights: Washington → Las Vegas
- Distance: 2,061 miles · nonstop flight time: 4h 41m.
- Cheapest upcoming week in the live data starts around Dec 23, with fares from $164.
- Of the months we're tracking right now, December 2026 has the lowest fares, starting at $54.
- Rule of thumb for this route: the sweet spot is usually 4–8 weeks before departure.
- Midweek departures (Tue–Thu) are consistently cheaper than weekend flights.
- Set a free Flyzento alert instead of checking daily — the best fares can sell out in hours.
Price trend
Cheapest departure weeks ahead
Departing around Dec 23 is currently the cheapest window — about $33 less than the nearest weeks. Based on recent fares found for this route; prices change quickly.
Cheapest month · Washington → Las Vegas
December 2026
Every date's recent round-trip fare, at a glance.
Fares from
$54
Cheapest: Thu, Dec 31 — $54 · Priciest: Dec 27 — $219
Get this fare →Recent fares found for specific dates in December 2026. Blank days had no recent fare in our data — ask our team and we'll check them for you.
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Flying from Washington to Las Vegas: what you need to know
The flight
Washington to Las Vegas is a transcontinental trip — 2,061 miles, roughly 4h 41m nonstop. Eastbound flights benefit from tailwinds and run shorter; westbound trips home fight headwinds and take longer, so pad your plans accordingly. Red-eyes are popular eastbound: you trade a short night of sleep for a full first day at your destination.
Airlines on this route
United Airlines flies this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Washington (IAD)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Washington airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Las Vegas (LAS)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Las Vegas airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Las Vegas to Washington fares — prices on the return direction often move on a different rhythm.
When to book
Of the months we're currently tracking, December 2026 is coming in cheapest for this route, with fares from $54. As a rule, booking 4–8 weeks ahead lands you in the sweet spot — leave it to the final two weeks and prices usually climb. If you see a fare that works, don't wait around: set a fare alert on this page and we'll watch the price for you.
Good to know before you go
- Tuesday and Wednesday departures are typically the cheapest days on domestic routes.
- Screenshot your fare before you enquire — prices move, and a saved fare helps our team match or beat it.
- December 2026 is currently the cheapest tracked month on this route — check those dates first if you're flexible.
- Morning flights are delayed less often than evening ones — earlier departures have the best on-time record.
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
Washington to Las Vegas flight FAQs
How long is the flight from IAD to LAS?
A nonstop from IAD to LAS clocks in at around 4h 41m for the 2,061-mile trip. If you're connecting, budget an extra 2–4 hours depending on where you stop.
Are there nonstop flights from Washington to Las Vegas?
Yes — look for United Airlines on this route. Nonstop seats are usually priced best 4–8 weeks before departure.
What is the cheapest month to fly from Washington to Las Vegas?
Of the months we're tracking right now, December 2026 has the lowest fares from Washington to Las Vegas, starting at $54. Fares update as new data comes in, so it's worth setting a free alert for your dates.
How much are last minute flights from IAD to LAS?
Book inside the final week and you'll usually pay a premium on IAD to LAS. Fares booked 4–8 weeks ahead are almost always kinder.
What is a good round-trip deal from Washington to Las Vegas?
A good deal is anything at or below the recent fares shown above. Set a free Flyzento alert and we'll ping you the moment fares drop.
Which airlines fly from Washington to Las Vegas?
The main carriers on this route are United Airlines. Comparing all of them on the live search below usually surfaces the lowest fare for your dates.
How early should I get to Washington airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
More cheap flights from Washington
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