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C$108 Cheap Flights from Chicago (CHIA) to Washington Dulles (IAD)

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Flight deals from Chicago to Washington Dulles

Looking for a cheap last-minute deal or the best return flight from Chicago to Washington Dulles Airport? If you want to travel next month, return fares start from C$244. Find the lowest prices on one-way and return tickets right here.
Washington D.C..C$108 per passenger.Departing Tue., Sep. 1.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago Midway on Tue., Sep. 1, arriving in Washington Dulles.Price includes taxes and charges.From C$108, select.
Washington D.C..C$122 per passenger.Departing Tue., Aug. 11.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue., Aug. 11, arriving in Washington Dulles.Price includes taxes and charges.From C$122, select.
Washington D.C..C$122 per passenger.Departing Wed., Nov. 4.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed., Nov. 4, arriving in Washington Dulles.Price includes taxes and charges.From C$122, select.
Washington D.C..C$122 per passenger.Departing Tue., Sep. 1.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue., Sep. 1, arriving in Washington Dulles.Price includes taxes and charges.From C$122, select.
Washington D.C..C$122 per passenger.Departing Wed., Jul. 29.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed., Jul. 29, arriving in Washington Dulles.Price includes taxes and charges.From C$122, select.
Washington D.C..C$122 per passenger.Departing Wed., Oct. 14.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed., Oct. 14, arriving in Washington Dulles.Price includes taxes and charges.From C$122, select.
Washington D.C..C$136 per passenger.Departing Wed., Jun. 24.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed., Jun. 24, arriving in Washington Dulles.Price includes taxes and charges.From C$136, select.
Washington D.C..C$200 per passenger.Departing Tue., Jan. 12.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue., Jan. 12, arriving in Washington Dulles.Price includes taxes and charges.From C$200, select.
Washington D.C..C$205 per passenger.Departing Thu., Dec. 10.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Thu., Dec. 10, arriving in Washington Dulles.Price includes taxes and charges.From C$205, select.
Washington D.C..C$205 per passenger.Departing Thu., Apr. 15.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Thu., Apr. 15, arriving in Washington Dulles.Price includes taxes and charges.From C$205, select.
Washington D.C..C$213 per passenger.Departing Tue., Mar. 30.One-way flight with Delta.Outbound indirect flight with Delta, departs from Chicago O'Hare International on Tue., Mar. 30, arriving in Washington Dulles.Price includes taxes and charges.From C$213, select.
Washington D.C..C$257 per passenger.Departing Tue., Mar. 30.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue., Mar. 30, arriving in Washington Dulles.Price includes taxes and charges.From C$257, select.
Washington D.C..C$290 per passenger.Departing Sun., May 31.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sun., May 31, arriving in Washington Dulles.Price includes taxes and charges.From C$290, select.
Washington D.C..C$558 per passenger.Departing Sun., May 31.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Sun., May 31, arriving in Washington Dulles.Price includes taxes and charges.From C$558, select.

Find the cheapest month to fly from Chicago to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago to Washington Dulles flights are currently cheapest in September.
May
from C$290
Jun.
from C$136
Jul.
from C$122
Aug.
from C$122
Sep.
from C$108
Oct.
from C$122
Nov.
from C$122
Dec.
from C$205
Jan.
from C$200
Feb.
Find prices
Mar.
from C$213
Apr.
from C$205

Which airlines fly from Chicago to Washington Dulles?

Chicago to Washington Dulles: Alternative routes

Compare routes from Chicago to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Washington Ronald Reagan

5km from central Washington D.C.
Closest
from C$122
Search flights

Camp Springs Andrews AFB

17km from central Washington D.C.
Search flights

Washington Dulles

37km from central Washington D.C.
from C$108
Search flights

Baltimore Washington International

44km from central Washington D.C.
Cheapest
from C$68
Search flights

Manassas

47km from central Washington D.C.
Search flights

Chicago to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight foundC$108
Cheapest month to flySeptember
Average flight time2 hrs, 3 mins
Most popular airlineUnited
Average flights per week492

Finding cheap flights from Chicago to Washington Dulles: Frequently asked questions

The best price we found for a return flight from Chicago to Washington Dulles is C$181. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 3 minutes is the average flight time from Chicago to Washington Dulles.
United, Air Canada and Air New Zealand fly direct from Chicago to Washington Dulles.
As of May 2026, there are 263 flights per week flying from Chicago to Washington Dulles.
The cheapest month to fly from Chicago to Washington Dulles is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to Washington Dulles Airport on Tuesday, September 22, 2026.
Yes – the average flight time is 2 hours and 3 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

Flying from Chicago to Washington Dulles International Airport (IAD): what you need to know

  • All great adventures start at one of Chicago's main airports, O'Hare International Airport (ORD) or Chicago Midway International Airport (MDW). Explore your options for booking a flight from Chicago to Washington Dulles International Airport (IAD) taking off from either of these.

  • Around 1 hour 56 minutes is how long you can expect to be travelling on a direct flight from Chicago to Washington Dulles International Airport.

  • Washington Dulles International Airport is located in Washington DC. The city operates in the UTC-4 timezone and is 1 hour ahead of Chicago.

  • With 49 direct weekly flights between the two airports, O'Hare International Airport (ORD) to Washington Dulles International Airport (IAD) is the most popular route. United operates the earliest flight at 06:55. If you'd like to make the most of your day before taking off, the last flight from ORD to IAD is with United at 21:45.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This will give you plenty of time to board your flight from Chicago to IAD.

  • If you're travelling during a peak month like August, get to the terminal even earlier. It's smart to arrive up to four hours before an international flight and two hours ahead of a domestic departure. Check-in and security lines will be longer during high seasons like summer and spring break.

Airports in Chicago

O'Hare International Airport (ORD)

  • Go straight to your destination from O'Hare International Airport (ORD). Nonstop flights from Chicago to Washington Dulles International Airport (IAD) are available from here.

  • You can travel on a direct flight from Chicago to Washington Dulles International Airport with United. This top airline operates services from ORD.

  • The distance from central Chicago to ORD is around 40 kilometres. Check out Google Maps for the best way to get there, whether that's in your own car or with public transport.

  • Looking for a handy hotel near O'Hare International Airport? If you're boarding an early flight from Chicago to Washington Dulles International Airport, these stays will put you moments from your departure lounge:

Chicago Midway International Airport (MDW)

  • Looking to fly out of Chicago Midway International Airport (MDW)? You can book a direct flight from Chicago to Washington Dulles International Airport (IAD) departing from this hub.

  • You can board a direct flight from Chicago to IAD with United. This is one of the leading carriers flying this route out of MDW.

  • MDW is around 19 kilometres from central Chicago. It takes 21 minutes or so to get to the airport driving from the city centre. Public transport takes approximately 46 minutes.

  • Want to enjoy an extra night away before catching your flight from Chicago to IAD? Kick back in a hotel near Chicago Midway International Airport before your break officially starts. These stays are calling your name:

About Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • Washington Dulles International Airport to central Washington DC takes around 51 minutes in a car. It's approximately 56 kilometres away. See what options are available, such as car rentals, cabs or ride-sharing.

  • Getting to the centre on public transport typically takes 3 hours and 26 minutes.

How to find the cheapest flights from Chicago to Washington Dulles International Airport (IAD)

  • The best price we've found for a one-way ticket from Chicago to Washington Dulles International Airport is C$108. The cheapest price for a return flight is C$181. Keep in mind fares may change due to demand at the time of booking.

  • Book 1 month before your departure date. After crunching the numbers on our calendar, this is how far you should book ahead to secure flight tickets from Chicago to IAD.

  • Plan your trip for October. That's the cheapest month for tickets from Chicago to Washington Dulles International Airport. If you have flexibility with your dates, use the 'Whole month' tool to find the best price across every month.

  • Set up a Price Alert and keep an eye on changes on this route through push notifications or email. We'll let you know when the fares drop. Timing is key for finding flight tickets from Chicago to IAD.

  • Use the filters to tailor your flights from Chicago to Washington Dulles International Airport. Select your preferred departure and arrival times, number of stops and airlines. You can also sort your results by 'Cheapest' to get the best deals.

The best time to fly from Chicago to Washington Dulles International Airport (IAD)

  • It's time to figure out your travel dates for your flight from Chicago to Washington Dulles International Airport. July is the most popular month to travel to Washington DC. If you prefer a more peaceful vibe, go in February.

  • Lock in your flight from Chicago to IAD for July if you're eager to visit the city during its warmest month. You can expect temperatures in Washington DC to range from 19ºC to 33ºC.

  • Look for cheap flights from Chicago to Washington Dulles International Airport in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between -6ºC and 10ºC on average.

More about Washington DC

  • Start your Washington DC trip off on the right foot by choosing the ideal place to stay. Once you've booked your flight from Chicago to Washington Dulles International Airport, check out our selection of accommodation options including:

  • There are so many things to do and see in this city it can be tricky to work out where to begin. White House Historical Association, The White House and National Mall are top sights which should be on any good Washington DC itinerary.

Complete your Washington DC trip with a car rental

  • Choose one of our car rentals in Washington DC and explore on your own terms. Easily compare rates from trusted providers in one place after booking your hotel and cheap flights from Chicago to Washington Dulles International Airport.

More travel options

Plan the rest of your trip from Chicago to Washington D.C.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.