Route Overview: Denver to Chicago
The air corridor connecting the Mile High City to the Windy City is one of the busiest and most competitive domestic routes in the United States. Whether you are traveling for business in the Loop or seeking the world-class museums of the lakefront, cheap flights from Denver to Chicago are readily available throughout the year. As a major hub-to-hub route, passengers benefit from high frequencies and a variety of service levels. At Faresterminal, we recently found a one-way Economy fare for October 5, 2026, at just $218 on Frontier Airlines (F9), featuring a non-stop duration of approximately 2 hours and 28 minutes. It is important to note that prices change daily based on demand, fuel costs, and booking lead times.
Flight duration and schedule
The average flight time for a DEN to ORD nonstop journey is roughly 2 hours and 30 minutes when traveling eastbound, aided by prevailing tailwinds. The return journey from Chicago to Denver typically takes about 3 hours due to headwinds. Flights depart as early as 5:00 AM and continue until nearly midnight, ensuring that travelers can find a schedule that fits their needs. For personalized assistance with complex itineraries, you can always call 1-800-518-9067 to speak with our travel experts.
Nonstop vs one-stop options
While the majority of travelers prefer the efficiency of direct flights, one-stop options are occasionally available via cities like Minneapolis (MSP), Kansas City (MCI), or St. Louis (STL). However, because United, American, and Southwest offer such high frequency, one-stop flights are rarely cheaper and often double the travel time. We recommend sticking to nonstop DEN-ORD flights unless you are specifically looking to build a multi-city trip.
Distance and typical aircraft
The Great Circle distance between Denver International Airport and O Hare International Airport is approximately 888 miles. This route is a workhorse for narrow-body jets. You will most commonly fly on the Boeing 737 family (including the MAX 8 and MAX 9) or the Airbus A320 family (A319, A320neo, and A321). These aircraft are perfectly suited for this mid-haul domestic leg, providing a balance of fuel efficiency and passenger comfort.
Airlines, Alliances and Aircraft on the DEN-ORD Route
Multiple carriers compete for your business on this route, representing all major business models from legacy giants to ultra-low-cost carriers.
United Airlines (Star Alliance)
United maintains a massive presence at both ends of this route. As a dual-hub operation, United Airlines offers the highest frequency of flights, often departing every hour during peak business windows. They utilize a mix of Boeing 737 and Airbus A320 aircraft. Travelers can choose between Basic Economy, Standard Economy, Economy Plus, and First Class.
American Airlines (oneworld)
American Airlines connects its Chicago hub with Denver several times daily. While they do not hub in Denver, their presence is significant, providing seamless connections for those traveling onward from ORD to the East Coast or Europe. Their fleet on this route primarily consists of the Boeing 737-800.
Frontier and Southwest
Frontier Airlines, headquartered in Denver, offers some of the lowest base fares, such as the $218 fare mentioned earlier. Southwest Airlines also operates heavily out of Denver; however, they primarily fly into Chicago Midway (MDW), though they have expanded some services to O Hare (ORD) in recent years. Always check your arrival airport code carefully when booking.
Cabin classes and seat tips
On the DEN to ORD route, legacy carriers offer a true First Class cabin with wider seats and complimentary meals. If you are flying Economy, try to secure a seat in the front half of the cabin to exit quickly, as O Hare is a large airport and taxi times can be long. For those on a budget, Frontier Airlines offers 'Stretch' seating for a modest fee, providing extra legroom that makes the 2.5-hour flight much more comfortable.
Departure Airport Guide: DEN
Denver International Airport (DEN) is famous for its iconic white peaked roof, designed to mimic the snow-capped Rocky Mountains. It is one of the largest airports by land area in the world, so arriving early is essential.
Terminals and check-in
DEN features a single main terminal, the Jeppesen Terminal, where check-in and baggage claim are located. After security, passengers take the automated terminal train to one of three concourses: A, B, or C. United typically operates out of Concourse B, while American and Frontier are usually found in Concourse A.
Getting to the airport
The RTD A-Line commuter rail is the most efficient way to reach DEN from downtown Denver (Union Station). The journey takes approximately 37 minutes and costs about $10.50. It is a favorite for budget-conscious travelers avoiding the heavy traffic on I-70 or Pena Boulevard.
Parking and rideshare pickup
Rideshare services like Uber and Lyft drop off on Level 5 of the Jeppesen Terminal. For those driving, the Economy lots offer a balance of price and proximity, with frequent shuttle service to the terminal. If you need a last-minute booking for a flight today, call 1-800-518-9067 for immediate support.
Arrival Airport Guide: ORD
Chicago O Hare International Airport (ORD) is a global gateway located about 17 miles northwest of the Loop. It is a sprawling complex that requires some navigation savvy.
Terminals and baggage claim
Domestic flights from Denver usually arrive at Terminal 1 (United), Terminal 3 (American), or Terminal 5 (Frontier). Terminal 5 was recently renovated to accommodate more domestic gates. Always check the monitors upon landing, as gate assignments can change during your flight.
Ground transportation into the city
The CTA Blue Line 'L' train is the most iconic and cost-effective way to reach the city. For $5, you can ride from the airport station directly into the heart of the Loop in about 45-50 minutes. Taxis and rideshares are available at designated zones; follow the 'App-Based Rides' signs which lead to the upper level of the parking garage for most terminals.
Cheapest Time to Fly and Fare Trends
Fares on the Denver to Chicago route fluctuate based on seasonality and major events. While business travel remains steady, leisure demand peaks in the summer and during the winter holidays.
Best days and months to book
Statistically, Tuesday and Wednesday are the cheapest days to fly. Booking at least 21 days in advance typically secures the best rates. For the absolute lowest prices, consider flying in the 'shoulder' months of January, February, or October.
Typical fare ranges by season
| Season | Typical one-way fare | Notes |
|---|---|---|
| Spring | $140 - $280 | Moderate prices, watch for Spring Break spikes. |
| Summer | $220 - $450 | Peak demand, book at least 6 weeks early. |
| Fall | $130 - $250 | Best value for pleasant weather. |
| Winter | $110 - $400 | Cheapest in Feb; expensive around Christmas. |
How to lock in the lowest fare on Faresterminal
To find the best Denver to Chicago flight deals, use the all Faresterminal route guides to compare different dates. Our search engine aggregates data from multiple carriers to show you the best price-to-duration ratio. If you find a fare like the $218 non-stop on Frontier, it is often wise to book immediately as these seats fill up fast.
Baggage Information and Fees
Baggage policies vary significantly between the major carriers on this route. Always read the fine print regarding Basic Economy tickets, which often exclude full-sized carry-ons.
| Airline | Carry-on | First checked bag | Second checked bag |
|---|---|---|---|
| United | $0 (Standard) | $35 - $40 | $45 - $50 |
| American | $0 (Standard) | $35 - $40 | $45 - $50 |
| Frontier | $50+ (Varies) | $50+ (Varies) | $60+ (Varies) |
| Southwest | $0 (2 bags) | $0 | $0 |
How to avoid baggage fees
The easiest way to avoid fees is to fly Southwest Airlines, which allows two free checked bags. Alternatively, using an airline-branded credit card or attaining elite status can waive fees on United and American. For ultra-low-cost carriers, prepaying for your bag during the initial booking on this page is significantly cheaper than paying at the airport counter.
Weather in Chicago Through the Seasons
Chicago weather is notorious for its rapid changes. Being prepared is the key to a successful trip from the dry climate of Colorado to the humid lakeside environment of Illinois.
| Season | Typical weather | What to pack |
|---|---|---|
| Spring | 40F - 60F, Rainy | Waterproof jacket and layers. |
| Summer | 70F - 90F, Humid | Light clothing and sunblock. |
| Fall | 45F - 65F, Breezy | Light sweaters and a windbreaker. |
| Winter | 15F - 35F, Snowy | Heavy coat, gloves, and thermal boots. |
Best months to visit
September and October are widely considered the best months to visit Chicago. The humidity of summer has faded, the fall foliage in Millennium Park is stunning, and the city's festival calendar is still active. May and June are also excellent, though occasionally prone to thunderstorms.
Where to Stay in Chicago
The Loop
The historic heart of the city, staying in the Loop puts you within walking distance of Millennium Park, the Art Institute of Chicago, and major corporate offices. It is ideal for first-time visitors and business travelers.
River North
If you are looking for nightlife, high-end dining, and the 'Magnificent Mile' shopping district, River North is the place to be. It features a high concentration of luxury hotels and trendy boutiques.
Wicker Park / Bucktown
For a more local, 'hipster' vibe, head west to Wicker Park. This neighborhood is famous for its indie record stores, coffee shops, and vibrant bar scene, all easily accessible via the Blue Line from the airport.
Events and Reasons to Visit Chicago
Chicago is a city of neighborhoods and festivals. Major draws include Lollapalooza in August, the Chicago Jazz Festival in September, and the Christkindlmarket during the winter holidays. Sports fans flock to the city to see the Cubs at historic Wrigley Field or the Bears at Soldier Field. Foodies will find heaven at Taste of Chicago or by exploring the city's legendary deep-dish pizza and Michelin-starred dining scene.
Travel Tips for Denver to Chicago Flyers
- Check the airport code: Ensure you are flying into ORD (O Hare) and not MDW (Midway) unless intended.
- Download the CTA app: Use Ventra to pay for train fares directly from your phone.
- Arrive 2 hours early: Security lines at DEN can be unpredictable due to the high volume of connecting passengers.
- Pack for humidity: Unlike Denver, Chicago summers are very humid; moisture-wicking fabrics are your friend.
- Use the underground walkway: At ORD, the neon-lit walkway between Concourses B and C in Terminal 1 is a must-see.
- Book mid-week: Save significantly by avoiding Friday and Sunday afternoon flights.
- Join loyalty programs: Even if you do not fly often, miles on United or American can be used for future cheap flights.
- Keep our number handy: For any flight changes or cancellations, call 1-800-518-9067 for 24/7 support.
Nearby and Related Routes
Travelers who frequently fly the Denver to Chicago route also explore other major hubs. Whether you are looking for Denver to Atlanta flights (DEN-ATL) or perhaps a trip to the East Coast with Denver to Boston flights (DEN-BOS), Faresterminal provides comprehensive coverage. Other popular searches include New York to Los Angeles (JFK-LAX), Chicago to Miami (ORD-MIA), and Dallas to Las Vegas (DFW-LAS). You might also be interested in Denver to Dallas flights (DEN-DFW) or heading to the capital with Denver to Washington flights (DEN-IAD).