CA $153 Cheap Flights from Denver (DEN) to Washington (IAD)

You can find one-way and return flights from DEN to IAD with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when DEN to IAD ticket fares go up or down.

The cheapest months to fly from DEN to IAD are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.

There are 2 airlines offering direct flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.). Here are the carriers:
* United operates 67 direct flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
* Southwest Airlines operates 14 direct flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.

Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Denver Intl. (DEN) to Washington Dulles Intl. (IAD), with tickets starting from around CA$225 for flights that can be booked for departure within the next year. Sun Country Airlines offers one of the cheapest connecting return flights from Denver Intl. (DEN) to Washington Dulles Intl. (IAD) starting from around CA$524. These prices are per adult, for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

To find a cheap flight from Denver, CO (DEN-Denver 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.

The best airline to fly with from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. United offers the most daily flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is great 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.

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.

You'll find approximately 11 nonstop flights per day from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.). For even more choices, look at flights that include layovers, as there are around 119 connecting flights per day. Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), Portland Intl. (PDX), and Seattle - Tacoma Intl. (SEA).

The earliest flight from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically departs around 12:00 AM local time. This service is offered by Frontier Airlines. Please note that this is a seasonal service, active in June and July. An early departure like this can be great for maximizing your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll typically find the most flights from Denver International Airport (DEN) to Washington Dulles International Airport (IAD) on a Friday, with around 68 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United, Delta, and American Airlines. Friday offers notably more flight options compared to other days of the week, making it a great day to consider for your trip.

The most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are in the early morning, from 6am to 9am. Many major carriers, including United, Delta and Alaska Airlines, offer flights during this window. Many travelers prefer this because it allows for an early arrival at your destination, giving you a full day for business or exploring.

When flying from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.), you have a few options. A nonstop flight typically takes around 3 hours 30 minutes. If you opt for a flight with one stop, your travel time will be longer, usually around 9 hours 18 minutes. For flights with two or more stops, expect the journey to take approximately 9 hours 18 minutes. The distance between these two airports is about 2332 kilometres. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.

Yes, you can fly business class or first class between DEN and IAD. You can fly business class with Frontier Airlines and Delta.

First class cabins are available on Alaska Airlines, United, Delta, and American Airlines.

It's easy to earn miles on a Denver, CO (DEN-Denver 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.

If you're planning to travel to Washington from Denver Intl. (DEN), you can fly directly into Washington Dulles Intl. (IAD). Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), or Seattle - Tacoma Intl. (SEA) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Denver, CO (DEN-Denver 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.

Securing a Denver, CO (DEN-Denver 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.

If you booked your Denver, CO (DEN-Denver 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.