Cheap flights from St Louis to Chicago-O'Hare Intl (STL - ORD)

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The best prices from St Louis to Chicago-O'Hare Intl are usually found in August or July, booked 60 days in advance, depart on a Monday or Saturday and return on a Tuesday

How to find the cheapest flight from
St Louis (STL) to Chicago-O'Hare Intl (ORD)

STL - ORD
Price
$168 - $263
ORD
Temperature
35.6 - 86 °F
ORD
Rainfall
1.5 - 4.8 inches

Popular in

March

High demand for flights, 13% potential price rise

Cheapest in

August

Best time to find cheap flights, 27% potential price drop

Round-trip from

$168

From St Louis to Chicago-O'Hare Intl

One-way from

$79

One-way flight from St Louis to Chicago-O'Hare Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from St Louis to Chicago-O'Hare Intl?

It’s generally more expensive to depart on a Sunday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from St Louis to Chicago-O'Hare Intl?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 20 days in advance, which can save you up to 10% on flights from St Louis to Chicago-O'Hare Intl compared to booking the week you need them. Waiting 20 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $137. For sooner than that we have options available in the next 3 days from $157.

What is the cheapest month to fly from St Louis to Chicago-O'Hare Intl?

April is one of the best times of the year to fly to Chicago-O'Hare Intl from St Louis. Prices for April average $135 per person but you can even find prices for as low as $33. The most expensive prices can be found in the month of December. Opting for a April flight can save you 49% on your journey compared to booking in April

When is the cheapest time to fly from St Louis to Chicago-O'Hare Intl (STL - ORD)?

One of the essential ways to save on airfare from St Louis to Chicago-O'Hare Intl is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 8% on airfare.

Cheap flights from St Louis to Chicago-O'Hare Intl in March, April 2021

9 Mar - 13 Apr
$90pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
15 Apr - 18 Apr
$98pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
14 Apr - 14 Apr
$99pp
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis

St Louis to Chicago-O'Hare Intl 2021 flight deals

9 Mar - 13 Apr
$90pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
15 Apr - 18 Apr
$98pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
14 Apr - 14 Apr
$99pp
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis

Non-stop flights to Chicago-O'Hare Intl from St Louis

14 Apr - 14 Apr
$99pp
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
7 Apr - 21 Apr
$116pp
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
24 Mar - 31 Mar
$133pp
STL
Lambert-St Louis
Multiple Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
United Airlines
Non-Stop
STL
Lambert-St Louis

Last minute flights from St Louis to Chicago-O'Hare Intl

9 Mar - 13 Apr
$90pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
9 Mar - 16 Mar
$115pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
9 Mar - 16 Mar
$131pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

One-way flights to Chicago-O'Hare Intl from St Louis

5:18 pm - 6:53 pm
Frontier
2 Stops
25h 35m
STL - ORD
Frontier
$79
Gotogate
2:30 am - 1:10 pm
Air Choice One
1 Stop
10h 40m
STL - ORD
Air Choice One
$89
Kiwi.com
9:27 am - 10:55 am
United Airlines
Nonstop
1h 28m
STL - ORD
United Airlines
$94
United

Related info for your journey

Flight FAQs

From St Louis to Chicago-O'Hare Intl

Are flight prices decreasing from St Louis to Chicago-O'Hare Intl due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and Chicago-O'Hare Intl for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Lambert-St Louis to Chicago O'Hare Intl to control the spread of COVID-19?

New policies can now be found on Delta to help keep travelers safe while flying. Some of the new policies that have been implemented to accommodate travelers flying from Lambert-St Louis to Chicago O'Hare Intl are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

Which airlines flying from Lambert-St Louis to Chicago O'Hare Intl have flexible cancellations due to COVID-19?

American Airlines, United Airlines, and Cape Air are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from St Louis to Chicago-O'Hare Intl for under $100 on Cheapflights?

Yes, there are multiple flights from St Louis to Chicago-O'Hare Intl for under $100. The cheapest flight booked recently is on Frontier for just $90, but on average you can expect to pay $125.

Are there nonstop flights from St Louis to Chicago-O'Hare Intl for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from St Louis to Chicago-O'Hare Intl under $100. A good price for a nonstop flight from St Louis to Chicago-O'Hare Intl is less than $167.

Are there last-minute flights available from St Louis to Chicago-O'Hare Intl for under $100?

There are currently 20+ open flights from St Louis to Chicago-O'Hare Intl within the next 7 days for less than $100.

What days are nonstop flights available from St Louis to Chicago-O'Hare Intl?

Nonstop flights are available for this route on the following days: Monday.

How many flights depart from St Louis to Chicago-O'Hare Intl on average per day?

Travelers can expect 4 flights from Lambert-St Louis to Chicago O'Hare Intl on average per day.
Morning (6am - Noon) - 100% of flight departures

Does it rain more in St Louis or Chicago-O'Hare Intl?

The rainfall in St Louis is generally less than the rainfall in Chicago-O'Hare Intl. This will continue over the next 15 days.

Is St Louis weather warmer or cooler than Chicago-O'Hare Intl?

Expect the weather to be around 90 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Chicago-O'Hare Intl is generally colder than in St Louis.

How long is the flight from St Louis to Chicago-O'Hare Intl?

Departing from St Louis to Chicago-O'Hare Intl will take you 1h 19m. Airlines will cover a distance of 259 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from St Louis to Chicago-O'Hare Intl round-trip?

Currently priced at $90, Frontier will fly you from St Louis to Chicago-O'Hare Intl and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Major Airline - these airlines can fly you to your destination from $99 and $139, respectively. Frontier is currently priced 60% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from St Louis to Chicago-O'Hare Intl one-way?

The cheapest airlines for a one-way flight from St Louis to Chicago-O'Hare Intl are Frontier ($48), American Airlines ($50), and Delta ($73).

Related searches

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Alternative routes for St Louis to Chicago-O'Hare Intl

Destination information for Chicago-O'Hare Intl

Flight duration
1h 17m
Average temperature for March in Chicago-O'Hare Intl
48.2 °F
Avg rainfall for March in Chicago-O'Hare Intl
2.2 ″

Airports servicing St. Louis

Airports servicing Chicago

Top 4 airlines flying from St Louis to Chicago-O'Hare Intl

Airline Cheapest Average Flexibility On-time COVID-19 safety
Cape Air
$73 $154 No cancel fee 63%

We couldn't confirm the COVID-19 safety measures taken by Cape Air. Please check directly on their website for additional information.

United Airlines
$131 $296 No cancel fee 69%
American Airlines
$147 $310 No cancel fee 71%
Delta
$158 $399 No cancel fee N/A

Hourly flight availability from St Louis to Chicago-O'Hare Intl

Morning 6 AM to noon 38% of STL to ORD departures
Afternoon Noon to 6 PM 38% of STL to ORD departures
Early morning Midnight to 6 AM 24% of STL to ORD departures
Evening 6 PM to midnight 0% of STL to ORD departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St Louis to Chicago-O'Hare Intl
Sunday
31 daily flights
Monday
35 daily flights
Tuesday
23 daily flights
Wednesday
24 daily flights
Thursday
37 daily flights
Friday
31 daily flights
Saturday
28 daily flights
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