$59 Find Cheap Flights from Chicago O'Hare Airport to St. Louis - Compare and Save

If you want to travel in an eco-friendly way, consider booking your flight with carriers serious about flight sustainability. Delta is vocal about its sustainability pledge to reduce its carbon emissions significantly. The airline is investing in offsetting its carbon, implementing clean air technology, and eliminating single-use plastic items. Keeping sustainable fleets is among its commendable initiatives.

The most convenient and sustainable way to catch your early morning flight, especially if you live far from ORD, is by booking a nearby hotel. Commuting in the morning amid traffic snarl-ups is worth avoiding. O’Hare Inn & Suites, Red Roof Inn Chicago, and Wyndham Chicago O’Hare offer great airport accessibility.

Passengers with limited mobility are considered on this route. For instance, if you book your ticket with Spirit Airlines, remember to make a special arrangement request. The carrier is dedicated to providing accessible, seamless, and comfortable air trips to all its travelers, regardless of their circumstances. The airline has a competent staff to offer meet-and-assist services, wheelchair support, and in-flight services.

Multiple options exist when connecting from Lambert-St Louis (STL) to the city center. A train operates the route from the airport to Stadium Metrolink Station, taking about 35 minutes. Line Bus also operates the route, arriving downtown St. Louis in about 1 hour and 15 minutes. Taxis take about 20 minutes to arrive at the city center.

Among airlines operating Chicago O'Hare Intl Airport to St. Louis flights:

• United Airlines: offers extra legroom; offers free seat selection
• American Airlines: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

2 airlines operate flights between Chicago O'Hare Intl Airport and St. Louis. The airlines offering nonstop flights on this route include:

• United Airlines
• American Airlines

Flights from Chicago O'Hare Intl Airport to St. Louis usually depart from Chicago O'Hare Intl (ORD) and arrive at Lambert-St Louis (STL).

Here are some options for this route, based on selected ticket types and cabin classes:

• United Airlines: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Three cabin classes are available on flights from Chicago O'Hare Intl Airport to St. Louis:

• Economy Class
• Business Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $191 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $343 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Canadair (Bombardier) Regional Jet CRJ-550 family is used most often on this route, operated mainly by United Airlines. Other aircraft seen on the route include Airbus A319 variants.

One-stop flights from Chicago O'Hare Intl Airport to St. Louis most commonly connect through:

• Quincy Regional (UIN) - 83% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 9% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 4% of one-stop connections
• Orlando (MCO) - 4% of one-stop connections

Quincy Regional (UIN) handles the largest share of one-stop connections on this route.

On the Chicago O'Hare Intl Airport to St. Louis route, being flexible with your departure day can save you up to 51%. Saturday is the cheapest day at $245 round-trip on average, while Monday is the most expensive at $496: a $251 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Chicago O'Hare Intl Airport to St. Louis route, 21% of flights were delayed in the past 3 months, with delays averaging 2 hours 9 minutes.

Afternoon is the busiest departure period on Chicago O'Hare Intl Airport to St. Louis flights, with 34% of flights leaving in that window. Morning departures account for 27%, evening flights for 26%, and night flights for 13%.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

These are the earliest and latest flight times available from Chicago O'Hare Intl Airport to St. Louis:

• Earliest: departs at 7:20 am and lands at 8:49 am
• Latest: departs at 11:05 pm and lands at 12:34 am.

The flight takes about 1h 29m.

Last-minute fares on this route - booked within 2 weeks of departure - run 61% above the route average of $339. Book 24 weeks before departure for the lowest fares.

A nonstop flight from Chicago O'Hare Intl Airport to St. Louis takes 1h 29m, covering 258 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

One-way fares from Chicago O'Hare Intl Airport to St. Louis are currently lower than usual. Average one-way flight prices are about $60, which is 76% below the typical average for this route.

Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 3h 44m, compared with 4h 16m via Quincy Regional (UIN) and 9h 01m via Atlanta Hartsfield-Jackson (ATL).

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from Chicago O'Hare Intl Airport to St. Louis range from $237 to $500, with an average of $339 over the past 12 months. Anything below $237 counts as a good deal.

American Airlines is the only airline on the Chicago O'Hare Intl Airport to St. Louis route offering in-flight Wi-Fi. Pricing depends on fare class.