Cheap Flights from Washington (IAD) to Cambridge (CBG)

Popular airlines from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG)

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Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG) cost?
Snag a cheap one-way flight or cheap return flight from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG)?
is the least expensive month to fly from IAD to CBG. Timing your trip outside of the busy season is often the key to scoring lower fares.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest IAD to CBG flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG)?
Nonstop flights from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to CBG?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on various factors, including the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG)?
Choose a flight from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG) that takes off before 3 PM to reduce the likelihood of delays. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG) last-minute?
Last-minute bookings from IAD to CBG are typically more expensive. To lock in the lowest prices, start looking for flights well ahead of time. That said, if you're flexible with your travel plans, you may score a cheap fare right before you leave.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Cambridge (CBG)?
If you booked your IAD to CBG flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

Travel information

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Cambridge
Distance
3675 mi

Book with confidence

Book with confidence

Washington to Cambridge Flights

The cheapest times to fly from Washington to Cambridge

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Cambridge are during the month of . You can find some of the cheapest flights from Washington to Cambridge with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Cambridge

Sunday is one of the best days to book for cheap flights from Washington to Cambridge: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Cambridge

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Cambridge in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Cambridge flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Cambridge airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Cambridge Flights

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*Available to One Key members.