Title: Cheap Flights from Trenton to Chicago (TTN to ORD) - Expedia.co.uk ![City of Chicago. Image of Chicago downtown and Chicago River with bridges at sunny summer day](https://images.trvl-media.com/place/178248/e6aa83ce-7ad8-43a5-9d1d-b055eefa7e78.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178248/e6aa83ce-7ad8-43a5-9d1d-b055eefa7e78.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Trenton (TTN) to Chicago (ORD) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Trenton–Mercer Airport (TTN) to Chicago O'Hare International Airport (ORD) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ttn,to:ord,departure:05/11/2025TANYT&leg2=from:ord,to:ttn,departure:12/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Frontier Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ttn,to:ord,departure:05/11/2025TANYT&leg2=from:ord,to:ttn,departure:12/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Find the cheapest month to fly from Trenton (TTN) to Chicago (ORD) ### January is typically the cheapest month to fly From £93 - £434 per traveller. ## Frequently asked questions ### How much is a flight from Trenton–Mercer Airport to ORD? > Based on airfares listed within the last 7 days on Expedia for flights departing within the next year, round-trip journeys from TTN to O'Hare Intl. Airport (ORD) start from . Book ASAP to score the best price for your big adventure. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Trenton–Mercer Airport to ORD? > The majority of flights can be cancelled online, but every airline has different terms and conditions. If you do need to cancel your flight, check out our [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033) and follow the instructions. ### How do I find cheap flights from Trenton–Mercer Airport to ORD that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for TTN to O'Hare Intl. Airport (ORD) flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Mercer Airport (TTN) to O'Hare Intl. Airport (ORD)? > You won't need a lengthy novel for this flight — it's only 1,100 kilometres from Trenton to Chicago. Find your way to your seat, order some food and you'll be in Chicago in next to no time. ### Which airlines fly direct from Trenton–Mercer Airport to O'Hare Intl. Airport (ORD)? > Currently, no airlines offer flights directly from TTN to ORD. You'll have to book a flight with at least one stop. To score the best price and connections, lock in your fare well ahead of time. ### Are Trenton–Mercer Airport to O'Hare Intl. Airport (ORD) flight tickets cheaper when they're purchased at the last minute? > Flight prices always go up and down, so there are no guarantees. While last-minute deals between TTN and ORD are possible, it's also a good idea to keep track of prices well before you fly. In fact, some carriers publish their prices up to 12 months before the departure date. Expedia is constantly updating the best airfare bargains around, so keep checking back and be ready to lock in your seat when fare prices drop. ## Travel information | Origin airport | Mercer | | --- | --- | | Destination airport | O'Hare Intl. | | Distance | 1104 km | ## Book with confidence ### Compare flights from Trenton to Chicago easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Trenton to Chicago. Operating between them flights per day, airlines cover the route. And fly direct, getting you to O'Hare Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Mercer to O'Hare Intl..   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Mercer (TTN) to O'Hare Intl. (ORD) The easiest way to view the best deals on flights from Trenton to Chicago today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Mercer to O'Hare Intl. start at just and range up to .   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Trenton and Chicago - booking your flight during , the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your Trenton to Chicago flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Mercer to O'Hare Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.   ## Explore a world of travel with Expedia - Flights - [Flights from Lake Of The Ozarks (AIZ) to Chicago (CHI)](https://www.expedia.co.uk/lp/flights/aiz/chi/lake-of-the-ozarks-to-chicago) - [Flights from Amsterdam (AMS) to Chicago (CHI)](https://www.expedia.co.uk/lp/flights/ams/chi/amsterdam-to-chicago) - [Flights from Atlanta (ATL) to Chicago (CHI)](https://www.expedia.co.uk/lp/flights/atl/chi/atlanta-to-chicago) - [Flights from Abu Dhabi (AUH) to Chicago (MDW)](https://www.expedia.co.uk/lp/flights/auh/mdw/abu-dhabi-to-chicago) - [Flights from Wilkes-Barre (AVP) to Chicago (CHI)](https://www.expedia.co.uk/lp/flights/avp/chi/wilkes-barre-to-chicago) - [Flights from Beirut (BEY) to Chicago (CHI)](https://www.expedia.co.uk/lp/flights/bey/chi/beirut-to-chicago) - [Flights from Birmingham (BHX) to Chicago (CHI)](https://www.expedia.co.uk/lp/flights/bhx/chi/birmingham-to-chicago) - 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