Question 1

What are the cheapest airlines to fly from Chicago to Washington, D.C. one-way?

Accepted Answer

One-way options have recently been found by users for as low as £52 on Southwest. Other airlines that offer cheap prices include Spirit Airlines from £52 and Frontier from £58 one-way.

Question 2

How far ahead should I book a flight from Chicago to Washington, D.C.?

Accepted Answer

To ensure you get the cheapest price possible for a flight from Chicago to Washington, D.C., you should look to book at least 41 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 3

What is the cheapest month to book a flight from Chicago to Washington, D.C.?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Chicago to Washington, D.C. (average of £599). Flying from Chicago to Washington, D.C. in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 4

What is the cheapest day to fly from Chicago to Washington, D.C.?

Accepted Answer

Travellers seeking maximum savings on their Chicago to Washington, D.C. flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 5

Weekly flight availability from Chicago to Washington, D.C.

Accepted Answer

The most flights from CHI to WAS are scheduled on a Friday (85 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (30 on average).

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

Question 7

E

Accepted Answer

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Question 8

What are the most popular routes from Chicago to Washington, D.C.?

Accepted Answer

The most popular route from Chicago to Washington, D.C. is Chicago O'Hare Intl - Washington, D.C. Dulles Intl. You may also consider Chicago O'Hare Intl - Washington, D.C. Reagan-National or Chicago O'Hare Intl - Baltimore/Washington.

Question 9

What are the most reliable airlines from Chicago to Washington, D.C.?

Accepted Answer

Before booking your flight to Washington, D.C. from Chicago, check out the most reliable airlines to get you to your destination on time: Avianca (80%), Air China (78%), Austrian Airlines( 77%).

Question 10

What is the cheapest day to fly round-trip from Chicago to Washington, D.C.?

Accepted Answer

Users have found that flying from Chicago to Washington, D.C. on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

Question 11

How far in advance should I book a flight from Chicago to Washington, D.C.?

Accepted Answer

To save up to 82% on this flight, we recommend booking at least 42 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Chicago to Washington, D.C. from £130 1-2 weeks out and tickets from £269 for flights departing within the next 72 hours.

Question 12

What is the cheapest month to fly from Chicago to Washington, D.C.?

Accepted Answer

The best pricing can be found in the month of August. Prices to Washington, D.C. from Chicago average £166. You can even find prices in August for less than £166, as users have found deals to Washington, D.C. from as low as £69. The month of January appears to be one of the more expensive times to travel to Washington, D.C. from Chicago. Flying in the targeted month can save you up to 12%.

Question 13

What is the cheapest time of day to fly from CHI to WAS?

Accepted Answer

When flying from Chicago to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 55% versus a flight at midday.

Question 14

Can I find deals for flights from Chicago to Washington, D.C. that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Chicago to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 15

How can I find direct flights from Chicago to Washington, D.C.?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Washington, D.C..

Question 16

Can I find deals for business class flights from Chicago to Washington, D.C.?

Accepted Answer

Yes. Cheapflights offers flight deals from Chicago to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 17

How does Cheapflights help users find flights from Chicago to Washington, D.C.?

Accepted Answer

When you search for this flight from Chicago to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 18

Why should you use Cheapflights to find cheap flight tickets from Chicago to Washington, D.C.?

Accepted Answer

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Chicago to Washington, D.C. for you. Better yet — we are completely free to use.

Question 19

Can Cheapflights find flights from Chicago to Washington, D.C. with no change fees?

Accepted Answer

Yes, we can. To see specific flights from Chicago to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 20

Can Cheapflights notify me if prices for flights from Chicago to Washington, D.C. become cheaper?

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Round-trip from	£76
One-way from	£52
Popular in	January
Cheapest in	August
Average price	£125
Good round-trip deal	£86 or less
Good one-way deal	£58 or less

Cheap flights from Chicago to Washington, D.C. from £52

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Chicago to Washington, D.C. are usually found in August or September, booked 41 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Chicago to Washington, D.C.

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Find flight deals from Chicago to Washington, D.C.

Cheapest flights from Chicago to Washington, D.C.Explore the most affordable flight options available from Chicago to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 August 2025.

Explore the most affordable flight options available from Chicago to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 August 2025.

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Best time to book a flight from Chicago to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Chicago with our price prediction graph.

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Everything you need to know about your flight from Chicago to Washington, D.C.

How far ahead should I book a flight from Chicago to Washington, D.C.?

Use this chart to determine the optimal time to book a return flight from Chicago to Washington, D.C.. Price data was last updated on 8 August 2025.

What is the cheapest month to book a flight from Chicago to Washington, D.C.?

What is the cheapest time of day to fly from CHI to WAS?

Find hourly flight availability from Chicago to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 August 2025.

Weekly flight availability from Chicago to Washington, D.C.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Chicago to Washington, D.C. one-way?

What are the most popular routes from Chicago to Washington, D.C.?

What are the most reliable airlines from Chicago to Washington, D.C.?

Can I find deals for flights from Chicago to Washington, D.C. that include hotel bookings?

How can I find direct flights from Chicago to Washington, D.C.?

Can I find deals for business class flights from Chicago to Washington, D.C.?

What is the cheapest month to book a flight from Chicago to Washington, D.C.?

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How does Cheapflights help users find flights from Chicago to Washington, D.C.?

Why should you use Cheapflights to find cheap flight tickets from Chicago to Washington, D.C.?

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Cheapest flights from Chicago to Washington, D.C.
Explore the most affordable flight options available from Chicago to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 August 2025.