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Cheap Flights from Chicago (CHIA) to Washington Dulles (IAD)

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Flight deals from Chicago to Washington Dulles Airport

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 £88. Find the lowest prices on one-way and return tickets right here.
Washington D.C..£88 per passenger.Departing Wed, 22 Apr, returning Wed, 29 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago Midway on Wed, 22 Apr, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 29 Apr, arriving in Chicago Midway.Price includes taxes and charges.From £88, select.
Washington D.C..£88 per passenger.Departing Tue, 21 Apr, returning Tue, 5 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago Midway on Tue, 21 Apr, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 5 May, arriving in Chicago Midway.Price includes taxes and charges.From £88, select.
Washington D.C..£109 per passenger.Departing Tue, 5 May, returning Sat, 9 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago Midway on Tue, 5 May, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sat, 9 May, arriving in Chicago O'Hare International.Price includes taxes and charges.From £109, select.
Washington D.C..£135 per passenger.Departing Thu, 28 May, returning Mon, 1 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Thu, 28 May, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 1 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From £135, select.
Washington D.C..£150 per passenger.Departing Tue, 31 Mar, returning Thu, 23 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago Midway on Tue, 31 Mar, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Thu, 23 Apr, arriving in Chicago Midway.Price includes taxes and charges.From £150, select.
Washington D.C..£155 per passenger.Departing Wed, 27 May, returning Wed, 3 Jun.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed, 27 May, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Wed, 3 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From £155, select.
Washington D.C..£155 per passenger.Departing Tue, 7 Apr, returning Wed, 8 Apr.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue, 7 Apr, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Wed, 8 Apr, arriving in Chicago O'Hare International.Price includes taxes and charges.From £155, select.
Washington D.C..£156 per passenger.Departing Tue, 21 Apr, returning Tue, 5 May.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue, 21 Apr, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Tue, 5 May, arriving in Chicago O'Hare International.Price includes taxes and charges.From £156, select.
Washington D.C..£156 per passenger.Departing Wed, 13 May, returning Wed, 20 May.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed, 13 May, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Wed, 20 May, arriving in Chicago O'Hare International.Price includes taxes and charges.From £156, select.
Washington D.C..£165 per passenger.Departing Mon, 1 Jun, returning Wed, 3 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 1 Jun, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 3 Jun, arriving in Chicago Midway.Price includes taxes and charges.From £165, select.
Washington D.C..£176 per passenger.Departing Mon, 1 Jun, returning Tue, 2 Jun.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Mon, 1 Jun, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Tue, 2 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From £176, select.
Washington D.C..£176 per passenger.Departing Tue, 31 Mar, returning Thu, 2 Apr.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Tue, 31 Mar, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Thu, 2 Apr, arriving in Chicago O'Hare International.Price includes taxes and charges.From £176, select.
Washington D.C..£199 per passenger.Departing Thu, 23 Jul, returning Sat, 25 Jul.Return flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departs from Chicago Midway on Thu, 23 Jul, arriving in Washington Dulles.Inbound indirect flight with Allegiant Air, departs from Washington Dulles on Sat, 25 Jul, arriving in Chicago Rockford.Price includes taxes and charges.From £199, select.
Washington D.C..£202 per passenger.Departing Sat, 1 Aug, returning Sat, 15 Aug.Return flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departs from Chicago Rockford on Sat, 1 Aug, arriving in Washington Dulles.Inbound indirect flight with Allegiant Air, departs from Washington Dulles on Sat, 15 Aug, arriving in Chicago Rockford.Price includes taxes and charges.From £202, select.
Washington D.C..£206 per passenger.Departing Wed, 3 Jun, returning Tue, 1 Dec.Return flight with Delta.Outbound indirect flight with Delta, departs from Chicago O'Hare International on Wed, 3 Jun, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Tue, 1 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From £206, select.
Washington D.C..£213 per passenger.Departing Fri, 12 Jun, returning Wed, 8 Jul.Return flight with Allegiant Air and Frontier Airlines.Outbound indirect flight with Allegiant Air, departs from Chicago Midway on Fri, 12 Jun, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 8 Jul, arriving in Chicago Midway.Price includes taxes and charges.From £213, 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 April.
Mar
from £241
Apr
from £88
May
from £109
Jun
from £165
Jul
from £199
Aug
from £202
Sep
from £218
Oct
from £214
Nov
from £214
Dec
from £216
Jan
Find prices
Feb
Find prices

Direct flights 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

3 miles from central Washington D.C.
Closest
from £119
Search flights

Camp Springs Andrews AFB

11 miles from central Washington D.C.
Search flights

Washington Dulles

23 miles from central Washington D.C.
from £88
Search flights

Baltimore Washington International

27 miles from central Washington D.C.
Cheapest
from £85
Search flights

Manassas

29 miles from central Washington D.C.
Search flights

Chicago to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found£88
Cheapest month to flyApril
Average flight time2 hrs
Most popular airlineUnited
Average flights per week253

Check out these Washington D.C. hotels

Ready to plan your stay? Other travellers rate these Washington D.C. hotels for cleanliness, service and location.
Sixty DC
0.73 miles from city centre
£290
Per night
Lyle Washington D.C.
0.93 miles from city centre
£239
Per night
Hotel Hive
0.95 miles from city centre
£178
Per night
Sixty DC
0.73 miles from city centre
£290
Per night
Lyle Washington D.C.
0.93 miles from city centre
£239
Per night
Hotel Hive
0.95 miles from city centre
£178
Per night
Explore top-rated hotels

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 £88. 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 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 March 2026, there are 253 flights per week flying from Chicago to Washington Dulles.
The cheapest month to fly from Chicago to Washington Dulles is usually April.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to Washington Dulles Airport on Wednesday, 22 April 2026.
Yes – the average flight time is 2 hours.
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

  • Your travels get underway at Chicago's main airport, Chicago O'Hare International Airport (ORD). Check out the options for booking a flight from Chicago to Washington Dulles International Airport (IAD) departing from this base.

  • Expect to be travelling for 1 hour 55 minutes. That's the average duration of a direct Chicago to Washington Dulles International Airport flight.

  • Washington DC is one hour ahead of Chicago. Washington Dulles International Airport is located in Washington DC, which runs on the UTC-5 timezone.

  • Chicago O'Hare International Airport (ORD) to Washington Dulles International Airport (IAD) is the most popular route. There are 38 direct departures a week to choose from. If you prefer to head out later, take the last flight with United Airlines at 9:31pm. Go for the first ORD to IAD departure operated by United Airlines at 8:45am if getting there sooner works for you.

  • For hassle-free travel, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you enough time to catch your flight from Chicago to IAD.

  • If you're going away during a peak month like July, be at the airport even earlier. You'll want to arrive up to four hours before international flights and two hours ahead of domestic departures. Expect lines to be longer during holiday periods like Christmas and New Year.

Airports in Chicago

Chicago O'Hare International Airport (ORD)

  • Chicago O'Hare International Airport (ORD) will have you travelling directly to your destination. Nonstop flights from Chicago to Washington Dulles International Airport (IAD) take off from this terminal.

  • United Airlines is a well-known airline that offers direct flights from Chicago to Washington Dulles International Airport departing from ORD.

  • The most frequently booked airline between ORD and IAD is United.

  • With 72.82% of services arriving as planned, United is the top on-time carrier on this route.

  • ORD is around 27 kms (17 miles) from central Chicago. If you're ride-sharing, catching a taxi or driving from the centre, it'll take 30 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the trip time to be around 45 minutes.

  • Want a hassle-free start to your holiday? Stay near Chicago O'Hare International Airport. Whether you have an early flight from Chicago to Washington Dulles International Airport or prefer not to rush, these hotels are just the thing:

  • 70% of flights that depart Chicago O'Hare International Airport land at their destination on time.

  • You'll find ORD at 10000 West O'Hare.

Chicago Midway International Airport (MDW)

  • You can reach MDW from the centre of Chicago in about 25 minutes by car, depending on traffic. The ride on public transport will take roughly 30 minutes to cover the 16 kms (10 miles) or so.

  • Start your holiday sooner with an extra night away from home. Before your Chicago to IAD flight, unwind in one of these hotels near Chicago Midway International Airport:

  • When it comes to keeping flights punctual, Chicago Midway International Airport has an on-time arrival performance of 76%.

  • You'll find MDW at 5700 South Cicero.

Chicago Rockford International Airport (RFD)

  • From the centre of Chicago, RFD is around 145 kms (90 miles) away. It'll take you roughly 1 hour 40 minutes to reach the airport by car and 2 hours or so on public transport.

  • Make catching an early Chicago to Washington Dulles International Airport flight the easiest part of your journey. Book a room at one of these hotels near Chicago Rockford International Airport and get to your boarding gate feeling relaxed and unhurried:

  • The on-time performance record of RFD is 71%. In other words, that's how often flights from this airport arrive at their final stop as planned.

  • Chicago Rockford International Airport is located at 2 Airport Cir.

About Washington Dulles International Airport (IAD)

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

  • From Washington Dulles International Airport, central Washington DC is around 40 kms (25 miles) away. It takes about 45 minutes to get to the city centre by car.

  • It'll take around 1 hour 10 minutes if you're travelling on public transport.

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

  • £43 is currently the lowest price for a one-way ticket from Chicago to Washington Dulles International Airport. Return flights start from £88. These prices may change depending on availability.

  • Book five months before your departure date. Pricing trends show that this is the ideal window for finding cheap flights from Chicago to IAD.

  • The best month for landing cheap Chicago to Washington Dulles International Airport tickets is October. Use the 'Whole month' tool to compare prices, then choose the dates with the lowest fares.

  • Snapping up a cheap plane ticket from Chicago to IAD is a breeze with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you as soon as a lower fare pops up.

  • Filters make it easier to dig up a deal for your flight from Chicago to Washington Dulles International Airport. Pick the flight times, carriers and stops that make sense for you. Then sort the results by 'Cheapest' to find the most affordable option fast.

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

  • February is the quietest month for flights from Chicago to Washington Dulles International Airport (IAD), while June is the most popular. Find the best time to visit Washington DC based on whether you like a laid-back vibe or a more bustling atmosphere.

  • When booking your Chicago to IAD plane ticket, consider the weather you're most comfortable in. July is the warmest month in Washington DC, with temperatures ranging from 19ºC to 33ºC.

  • For cooler conditions, look for a cheap ticket from Chicago to Washington Dulles International Airport in January when temperatures are between -6ºC and 10ºC.

More about Washington DC

Explore more of the United States

  • Philadelphia is just one of the many cities in the United States waiting to be explored once you've seen the sights of Washington DC. Around 225 kms (140 miles) away to the northeast, check out popular attractions including Independence Hall, Liberty Bell and Philadelphia Museum of Art.

  • Virginia Beach is another sought-after destination in the United States and is around 274 kms (170 miles) southeast of Washington DC. No trip is complete without dropping by Virginia Beach Boardwalk, Resort Beach and Neptune's Park.

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.