IAH - CHI

$57 Find Cheap Flights from Houston George Bush Airport to Chicago

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from George Bush Intcntl to Chicago departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Chicago, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Chicago, as well as popular online travel agencies
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Flight Deals

Cheap Flights from George Bush Intcntl to Chicago (IAH-CHI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from George Bush Intcntl to Chicago that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from George Bush Intcntl to Chicago

Wed, Dec 3 - Sun, Dec 7
Frontier Logo
7:59 am - 2:31 pmIAH-ORD
6h 32m1 stop
Frontier Logo
3:47 pm - 6:56 pmORD-IAH
3h 09mnonstop
$97Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Frontier Logo
8:49 am - 9:58 pmIAH-MDW
13h 09m1 stop
Frontier Logo
2:01 pm - 5:08 pmMDW-IAH
3h 07mnonstop
$97Frontier
Find Deal
Fri, Nov 21 - Sun, Nov 23
Frontier Logo
10:22 am - 1:13 pmIAH-ORD
2h 51mnonstop
Frontier Logo
6:30 am - 9:27 amORD-IAH
2h 57mnonstop
$98Frontier
Find Deal
Tue, Nov 11 - Thu, Nov 13
Frontier Logo
5:28 pm - 8:14 pmIAH-ORD
2h 46mnonstop
Frontier Logo
1:36 pm - 4:33 pmORD-IAH
2h 57mnonstop
$99Frontier
Find Deal
Thu, Jan 15 - Sun, Jan 18
Frontier Logo
7:07 pm - 9:55 pmIAH-ORD
2h 48mnonstop
Frontier Logo
7:00 am - 7:03 pmORD-IAH
12h 03m1 stop
$100Frontier
Find Deal
Sun, Jan 11 - Sun, Jan 18
Frontier Logo
6:08 pm - 8:45 pmIAH-MDW
2h 37mnonstop
Frontier Logo
2:12 pm - 10:37 pmMDW-IAH
8h 25m1 stop
$100Frontier
Find Deal
Tue, Dec 2 - Wed, Dec 10
Spirit Airlines Logo
12:10 pm - 2:48 pmIAH-ORD
2h 38mnonstop
Spirit Airlines Logo
9:14 pm - 11:59 pmORD-IAH
2h 45mnonstop
$101Spirit Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
Spirit Airlines Logo
10:17 am - 12:47 pmIAH-ORD
2h 30mnonstop
Spirit Airlines Logo
1:52 pm - 4:38 pmORD-IAH
2h 46mnonstop
$105Spirit Airlines
Find Deal
Wed, Dec 3 - Thu, Dec 11
Multiple Airlines Logo
7:59 am - 2:31 pmIAH-ORD
6h 32m1 stop
Multiple Airlines Logo
9:14 pm - 11:59 pmORD-IAH
2h 45mnonstop
$106Multiple Airlines
Find Deal
Tue, Dec 2 - Sat, Dec 6
Spirit Airlines Logo
12:10 pm - 2:48 pmIAH-ORD
2h 38mnonstop
Spirit Airlines Logo
12:09 pm - 10:43 pmORD-IAH
10h 34m1 stop
$115Spirit Airlines
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
American's Main Cabin Extra offers early boarding.
Spirit's Wi-Fi provides gate-to-gate coverage.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $97 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
IAH-MDW
Cheapest • 9% average savings
IAH-ORD
Most popular
Insights
Insights
Insights
Insights
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 35% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 26% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$97
Overall average: $263
Frontier
Wed 12/3Sun 12/7
IAH - ORD • 1 stop
Cheapest non-stop
$97
Typical prices: $139-$359
Frontier
Fri 11/21Sun 11/23
IAH - ORD • Non-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Chicago!
Booking Insights

KAYAK's insights & trends for George Bush Intcntl to Chicago flights

Get data-powered insights and trends into flights from George Bush Intcntl to Chicago to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Houston George Bush Intcntl Airport to Chicago flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Houston George Bush Intcntl Airport to Chicago costs $84 on the route between Houston George Bush Intcntl Airport (IAH) and Chicago Midway Airport (MDW). Over the past month, this route was, on average, 9% cheaper than other Houston George Bush Intcntl Airport-Chicago routes. The most popular route is between Houston George Bush Intcntl Airport (IAH) and Chicago O'Hare Intl Airport (ORD).

What’s the cheapest day of the week to fly from Houston George Bush Airport to Chicago?

The average price of all round-trip flights from Houston George Bush Intcntl Airport to Chicago clicked on KAYAK for each day over the last 12 months.

For Houston George Bush Airport to Chicago, Friday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Chicago back to Houston George Bush Airport, the best deals are generally found on Thursday, with Monday being the most expensive.

What is the cheapest month to fly from Houston George Bush Intcntl Airport to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston George Bush Intcntl Airport to Chicago, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Houston George Bush Intcntl Airport to Chicago is March, where tickets cost $141 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $258 and $226 respectively.

Can I save money by flying with a layover from Houston George Bush Intcntl Airport to Chicago?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $206, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Houston George Bush Intcntl Airport to Chicago?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Houston George Bush Intcntl Airport to Chicago, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Houston George Bush Intcntl Airport to Chicago, you should book around 3 weeks before departure, which saves you about 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Expert advice

Expert advice for your flight from George Bush Intcntl to Chicago

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Frontier

Frontier's Economy Bundle includes a carry-on bag and seat choice, ideal for budget travelers.


Frontier's Premium Bundle offers priority boarding and extra legroom for just $20 more.

Read more about Frontierby Stefanie Waldek
Spirit Airlines

Spirit's Big Front Seat offers 20-inch width and 11” extra legroom, enhancing comfort.


Spirit's Wi-Fi offers gate-to-gate coverage, ideal for staying connected throughout the flight.

United Airlines

United's Economy Plus offers up to 6 inches more legroom, enhancing comfort on short flights.


United's Priority Boarding in Zone 2 ensures overhead bin space for your carry-on.

American Airlines

American's Main Cabin Extra offers early boarding and complimentary drinks, enhancing travel experience.


American's Wi-Fi offers 20 minutes free with an ad, ideal for quick tasks.

Airports
IAH

IAH's security lines are standard TSA, with wait times listed on the airport website. Consider terminal-hopping only if wait differences exceed 20-30 minutes.

Read more about IAHby John Walton
ORD

Take the CTA Blue Line from ORD to downtown Chicago for a 45-minute ride, avoiding traffic and offering free transfers to other lines.

Read more about ORDby Stefanie Waldek
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier, United Airlines and ORD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Joe Cortez

Joe Cortez

Expert on Spirit Airlines

Joe Cortez

Joe Cortez

Joe Cortez is a seasoned managing editor in aviation with over a decade of industry experience. His work has been featured on prominent platforms such as FlyerTalk and TripSavvy, establishing him as a respected voice in aviation journalism.

Read more
Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
John Walton

John Walton

Expert on IAH

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more

Good to know

Low seasonJanuary
Cheapest flight$57
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Houston George Bush Airport to Chicago O'Hare Airport

When to book flights from George Bush Intcntl to Chicago

Are your dates flexible? Find out the best times to travel from George Bush Intcntl to Chicago based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Houston George Bush Airport to Chicago flights

  • What is the cheapest flight from Houston George Bush Intcntl Airport to Chicago?

    In the last 3 days, the lowest price for a flight from Houston George Bush Intcntl Airport to Chicago was $57 for a one-way ticket and $97 for a round-trip.

  • Do I need a passport to fly between Houston George Bush Airport and Chicago?

    No, a passport isn't needed to fly from Houston George Bush Airport to Chicago. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Houston George Bush Airport to Chicago?

    On your way to Chicago, you’ll fly out from Houston George Bush Intcntl. You’ll be landing in one of Chicago’s 2 airports: Chicago Midway or Chicago O'Hare Intl.

  • Which airlines offer Wi-Fi service onboard planes from Houston George Bush Airport to Chicago?

    American Airlines, JetBlue, and Delta offer inflight Wi-Fi service on the Houston George Bush Airport to Chicago flight route.

  • Which aircraft models fly most regularly from Houston George Bush Airport to Chicago?

    The Airbus A321neo is the aircraft model that flies most regularly on the Houston George Bush Airport to Chicago flight route.

  • Which airline alliances offer flights from Houston George Bush Airport to Chicago?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Houston George Bush Airport and Chicago, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Houston George Bush Airport to Chicago?

    There are nonstop flights from Houston George Bush Airport to Chicago on a daily basis.

  • Which is the best airline for flights from Houston to Chicago, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Houston to Chicago are United Airlines and American Airlines. With an average price for the route of $354 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $256 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Houston George Bush Airport to Chicago?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Houston George Bush Airport to Chicago.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Houston George Bush Airport to Chicago?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Houston George Bush Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Houston George Bush Airport to Chicago?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago with an airline and back to Houston George Bush Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Houston George Bush Airport to Chicago?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago from Houston George Bush Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Houston George Bush Intcntl Airport to Chicago

  • Looking for a cheap flight? 25% of our users found flights on this route for $87 or less one-way and $170 or less round-trip.

Prefer to fly direct from Houston George Bush Airport to Chicago?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Houston George Bush Intcntl to Chicago.
Find which airlines fly direct from Houston George Bush Intcntl Airport to Chicago, which days they fly and book direct flights.

Direct departures

Houston George Bush Intcntl to Chicago

Monday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Tuesday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Wednesday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Thursday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Friday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Saturday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Sunday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

See more direct flights

Direct returns

Chicago to Houston George Bush Intcntl

Monday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Tuesday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Wednesday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Thursday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Friday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Saturday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

Sunday

American Airlines, Frontier, Spirit Airlines, +1 more

American Airlines, Frontier, +2 more

See more direct flights

Reviews of the top 4 airlines serving from George Bush Intcntl to Chicago

 
See real verified KAYAK customer reviews for airlines flying from Houston to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from George Bush Intcntl to Chicago? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8998 reviews
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
Airline reviews

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

10.0 ExcellentDr. Joseph, Oct 2025STL - ORD
Read more United Airlines reviews

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

Excellent experience. Starting with the agent at the Premier bag drop who noticed I was very early for my scheduled flight and offered to rebook me on an earlier flight with my seat preference. She would not let me leave the counter until she knew that all of the changes and new boarding pass showed up on my United app. At the gate, the flight boarded quickly such that we departed early and the flight was smooth. We arrived 20 minutes early at ORD and I was able to be home in time for dinner. One of the best flights I've had.

Salina to travers city was great! But the sept 24 Tranverse city was not! Traverse city to chichago was cancelled, i went to Denver & got to Salina 6 hours later!

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

Excellent - explanations were clear staff was nice and flight was comfortable

Lost bag and 2 days no word leaving for cruise no clothes or stuff

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

Always comes in handy when I want a quick weekend getaway.

Excellent experience when I am looking for a budget airline where the main expectation is getting me from point A to point B with no frills.

Had to deplane for undisclosed mechanical issue. Landed in Chicago 3 hours late. Food voucher at FLL came just as we were recording. Crew and agents were troopers--better than Spirit last night.

We spent 5 1/2 hours at Ohare cause our flight was diverted cause of rain in the area. We missed appts that we had set on Tuesday and cause we were flying back the next day on the 7am flight we had no time to reschedule anything. Other airlines were landing and taking off fine having no issues. It was only Spirit. Very frustrating flight and I understand why the flights are only around 25-30% full.

Spirit is low fare air line. Food also cost you. No free food.

Everyone was kind for the most part. I did travel with children and paid for seats and even then it was not as suitable. I tried calling their customer service prior to check in and I was told they couldn't help me because I didn't purchase my tickets with them.

I think the staff was nice. They took time to explain safety protocols. Boarding was great. They started early and our flight left a little early which was convenient. Having free games to play would have been better

Just total easy flight experience!! What could you do better..? Hmmm..? There was nothing I can remember. Spirit was a far more comfortable and easy process than American, United & Delta. I'll always look for Spirit and I've told a few people about, since flying this past trip!! I'm a SPIRIT FAN!! Thank You, SPIRIT AIRLINES!! Very, VERY well done, 100%!! See you...SOON!! -Best, Linda R.

Spirit is a very uncomfortable travel experience. It’s cheap but you are squeezed into the seats like canned meat.

The seat belt was lengthy enough that I did not need an extender. Courteous and helpful flight attendants.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

It was well done. It was my first time flying with them and I was nervous b/c I have heard of many cancelled and/or delray flights. Everything went smoothly.

Just know that everything, and I mean everything is “ala cart”. 60$ just to put something in the overhead bin. I will never fly Frontier again nor do I recommend them to anyone else.

The single worst check in experience I could imagine. I’ll never do any business with Frontier or any affiliated company

Too many extra fees, uncomfortable, little leg room. Will not recommend this airline.

Everyone seemed to be in zone 1 for boarding. Maybe break it up a little. Otherwise, smooth flight.

Everything you need to know for your flight from George Bush Intcntl to Chicago

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