Route guide · 2,061 miles
Cheap Flights from Las Vegas to Washington
LAS → IAD · Nonstop 4h 41m · Live round-trip fares
If Washington is next on your list, here's the honest picture on fares from Las Vegas. The trip covers about 2,061 miles and takes roughly 4h 41m in the air. Prices on this route reward planners: booking 4–8 weeks ahead is the sweet spot, and the lowest fares tend to sell out fast.
Live fares for LAS → IAD 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
LAS → IAD
Cheapest month
October 2026
Fares from $146
Nonstop airlines
1
United Airlines
Nonstop flights from Las Vegas to Washington
Want to skip the layover? Nonstops from Las Vegas to Washington are flown by United Airlines, getting you there in about 4h 41m. For the lowest fares, book around 4–8 weeks before departure — last-minute nonstops on this route rarely come cheap.
Booking insights: Las Vegas → Washington
- Distance: 2,061 miles · nonstop flight time: 4h 41m.
- Cheapest upcoming week in the live data starts around Oct 15, with fares from $146.
- Of the months we're tracking right now, October 2026 has the lowest fares, starting at $146.
- Rule of thumb for this route: the sweet spot is usually 4–8 weeks before departure.
- If your dates flex by a day or two, shifting to a midweek departure is the easiest saving there is.
- Set a free Airfare Deal alert instead of checking daily — the best fares can sell out in hours.
Price trend
Cheapest departure weeks ahead
Near-term departures around Oct 15 are currently the cheapest on this route. Based on recent fares found for this route; prices change quickly.
Cheapest month · Las Vegas → Washington
October 2026
Every date's recent round-trip fare, at a glance.
Fares from
$146
Cheapest: Sat, Oct 17 — $146 · Priciest: Oct 26 — $246
Get this fare →Recent fares found for specific dates in October 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 Las Vegas to Washington: what you need to know
The flight
Las Vegas to Washington 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 Las Vegas (LAS)
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 Las Vegas airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Washington (IAD)
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 Washington airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Washington to Las Vegas fares — prices on the return direction often move on a different rhythm.
When to book
Of the months we're currently tracking, October 2026 is coming in cheapest for this route, with fares from $146. 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
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 4h 41m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
Las Vegas to Washington flight FAQs
How long is the flight from LAS to IAD?
Nonstop flights from Las Vegas to Washington take about 4h 41m and cover roughly 2,061 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from Las Vegas to Washington?
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 Las Vegas to Washington?
Of the months we're tracking right now, October 2026 has the lowest fares from Las Vegas to Washington, starting at $146. 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 LAS to IAD?
Walking up to this route at the last minute is the expensive way to do it — prices inside 7 days of departure climb fast. The 4–8 weeks booking window is where the value sits.
What is a good round-trip deal from Las Vegas to Washington?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from Las Vegas to Washington?
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 Las Vegas 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.
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