£129 Cheap Flights from Salt Lake City (SLC) to Washington (IAD)

View £129 flight on Thu, 29 Oct 2026Opens in a new window

Popular airlines from Salt Lake City International Airport (SLC) to Washington Dulles International Airport (IAD)

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Cheap Flights from Salt Lake City (SLC) to Washington (IAD)

Prices were available within the past 7 days and start at £129 for one-way flights and £377 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£377 Return, found 8 hours ago
£377
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £377 found 8 hours ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£414 Return, found 8 hours ago
£414
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £414 found 8 hours ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£415 Return, found 8 hours ago
£415
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £415 found 8 hours ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£421 Return, found 8 hours ago
£421
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £421 found 8 hours ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£451 Return, found 8 hours ago
£451
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £451 found 8 hours ago
Alaska Airlines
Sat, 23 May - Mon, 25 May
SLC
Salt Lake City
IAD
Washington
£453 Return, found 1 day ago
£453
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 23 May from Salt Lake City to Washington, returning Mon, 25 May, priced at £453 found 1 day ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£459 Return, found 8 hours ago
£459
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £459 found 8 hours ago
Alaska Airlines
Sat, 23 May - Mon, 25 May
SLC
Salt Lake City
IAD
Washington
£469 Return, found 1 day ago
£469
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 23 May from Salt Lake City to Washington, returning Mon, 25 May, priced at £469 found 1 day ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£470 Return, found 8 hours ago
£470
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £470 found 8 hours ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
SLC
Salt Lake City
IAD
Washington
£477 Return, found 8 hours ago
£477
Return
found 8 hours ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Salt Lake City to Washington, returning Wed, 24 Jun, priced at £477 found 8 hours ago

Frequently asked questions

Which airlines fly direct from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter SLC to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, UA typically offers the lowest fares. AS offers the most daily flights from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 2 nonstop flights per day from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.). For even more choice, look at flights that include layovers, as there are around 93 connecting flights per day. Some common connection points include Portland Intl. (PDX), Denver Intl. (DEN), and Seattle - Tacoma Intl. (SEA).
What is the earliest flight from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Salt Lake City International Airport (SLC) to Washington Dulles International Airport (IAD) typically departs at approximately 12:10 AM local time, operated by Frontier Airlines. This is a seasonal service active in May and June. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll typically find the most flights from Salt Lake City International Airport (SLC) to Washington Dulles International Airport (IAD) on a Friday, with around 51 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Delta Air Lines, and Alaska Airlines. Flight schedules are fairly consistent throughout the week, with Fridays offering about 10% more flights than other days.
What are the most popular departure times for flights from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Salt Lake City Intl. (SLC) to Washington Dulles Intl. (IAD) are in the morning, between 6am and 9am. This accounts for around 30% of total traffic. Many major carriers, including United Airlines, Delta Air Lines and Southwest Airlines, offer flights during this window. Many travelers prefer these early morning flights as they allow you to arrive at your destination with plenty of time for business or to start your day of exploring.
How long does it take to fly from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A nonstop flight from SLC to IAD typically takes around 4 hours, covering approximately 1,824 miles. Connecting flights on this route usually add 4 hours 30 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Select the "Business class" and "First class" filters when looking for SLC to IAD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Salt Lake City Intl. (SLC)?
From Salt Lake City Intl. (SLC), you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA) in Washington. Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), Seattle - Tacoma Intl. (SEA) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Salt Lake City, UT (SLC-Salt Lake City Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Salt Lake City Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines
Return price
£377
Distance
2918 km
Average flight time
7 hours 10 mins

Book with confidence

Compare flights from Salt Lake City to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Salt Lake City to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Salt Lake City Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Salt Lake City Intl. (SLC) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from Salt Lake City to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Salt Lake City Intl. to Washington Dulles Intl. start at just £377 and range up to £477.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Salt Lake City and Washington
  • booking your flight during June, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Salt Lake City to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Salt Lake City Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Salt Lake City to Washington easily and book with confidence

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*Available to Expedia members.