Cheap flights from Chicago to Lambert-St Louis Intl (CHI - STL)

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The best prices from Chicago to Lambert-St Louis Intl are usually found in July or May, booked 51 days in advance, depart on a Saturday or Wednesday and return on a Monday

How to find the cheapest flight from
Chicago (CHI) to Lambert-St Louis Intl (STL)

CHI - STL
Price
$128 - $284
STL
Temperature
44.6 - 89.6 °F
STL
Rainfall
2.2 - 5.1 inches

Popular in

March

High demand for flights, 18% potential price rise

Cheapest in

July

Best time to find cheap flights, 45% potential price drop

Round-trip from

$128

From Chicago to Lambert-St Louis Intl

One-way from

$69

One-way flight from Chicago to Lambert-St Louis 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 Chicago to Lambert-St Louis Intl?

Departing on a Friday is a good option for securing a great price. You can expect to save up to 17% when planning your travel around this day of the week.

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

Travelers have found it’s best to book a flight 61 days in advance to save up to 33% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 61 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Chicago to Lambert-St Louis Intl 1-2 weeks in advance for as low as $143, or $179 for flights within the next 24 hours.

What is the cheapest month to fly from Chicago to Lambert-St Louis Intl?

The best pricing can be found in the month of June. Prices to Lambert-St Louis Intl from Chicago average $148. You can even find prices in June for less than $148, as users have found deals to Lambert-St Louis Intl from as low as $77. The month of July appears to be one of the more expensive times to travel to Lambert-St Louis Intl from Chicago. Flying in the targeted month can save you up to 34%.

When is the cheapest time to fly from Chicago to Lambert-St Louis Intl (CHI - STL)?

It’s optimal to fly from Chicago to Lambert-St Louis Intl at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the afternoon.

Cheap flights from Chicago to Lambert-St Louis Intl in March, April 2021

22 Apr - 6 May
$90pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
22 Apr - 25 Apr
$98pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
13 Apr - 13 Apr
$99pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Chicago to Lambert-St Louis Intl 2021 flight deals

22 Apr - 6 May
$90pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
22 Apr - 25 Apr
$98pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
13 Apr - 13 Apr
$99pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Non-stop flights to Lambert-St Louis Intl from Chicago

13 Apr - 13 Apr
$99pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
1 Apr - 6 Apr
$133pp
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
21 Apr - 25 Apr
$136pp
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Last minute flights from Chicago to Lambert-St Louis Intl

9 Mar - 10 Mar
$98pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
12 Mar - 15 Mar
$104pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
12 Mar - 17 Mar
$118pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

One-way flights to Lambert-St Louis Intl from Chicago

2:15 am - 4:33 pm
Frontier
1 Stop
14h 18m
ORD - STL
Frontier
$69
Gotogate
2:00 pm - 11:10 am
Air Choice One
1 Stop
21h 10m
ORD - STL
Air Choice One
$76
Gotogate
2:00 pm - 3:25 pm
United Airlines
Nonstop
1h 25m
ORD - STL
United Airlines
$88
United

Related info for your journey

Flight FAQs

From Chicago to Lambert-St Louis Intl

Are flight prices decreasing from Chicago to St Louis 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 Chicago and St Louis 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 Chicago to Lambert-St Louis to control the spread of COVID-19?

New policies can now be found on Delta to help keep travelers safe while flying. New policies for travelers booking flights from Chicago to Lambert-St Louis include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

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

Due to the rapidly changing circumstances due to COVID-19, airlines like American Airlines, United Airlines, and Cape Air flying from Chicago to Lambert-St Louis have implemented new flexible cancellation policies.

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

Yes, there are multiple flights from Chicago to Lambert-St Louis Intl for under $100. The cheapest flight booked recently is on Frontier for just $90, but on average you can expect to pay $124.

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

Cheapflights has at least 20 direct flights from Chicago to Lambert-St Louis Intl under $100. A good price for a nonstop flight from Chicago to Lambert-St Louis Intl is less than $220.

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

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

What days are nonstop flights available from Chicago to St Louis?

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

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

Travelers can expect 8 flights from Chicago to Lambert-St Louis on average per day.
Morning (6am - Noon) - 63% of flight departures
Afternoon (Noon - 6pm) - 25% of flight departures
Evening (6pm - Midnight) - 13% of flight departures

Is Chicago weather warmer or cooler than St Louis?

Our data indicates that the weather will be 90 °F on average in the month of July. The temperature in St Louis is typically hotter than in Chicago. If you're traveling when the temperature is at its warmest, push to plan early, as flight price and availability will have an impact on your travels. For the best results, search for flights well in advance or after peak season.

How long is the flight from Chicago to Lambert-St Louis Intl?

American Airlines, Major Airline, and Delta can get you from Chicago to Lambert-St Louis Intl in just under 1h 14m. Your travel time can differ by up to 2h 26m. The distance between Chicago and Lambert-St Louis Intl is about 252 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

Our cheapest airline available from Chicago to Lambert-St Louis Intl is Frontier. Our recent data shows that you can find tickets from as low as $90 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $114 and $144 round-trip. These flights start at 61% lower than the current average price 3 months from now.

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

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $49. However, be on the lookout for offers from Air Choice One and Delta, as they are both options that can get you from Chicago to Lambert-St Louis Intl for a low price.

Alternative routes for Chicago to Lambert-St Louis Intl

Destination information for Lambert-St Louis Intl

Flight duration
1h 21m
Average temperature for March in Lambert-St Louis Intl
59.0 °F
Avg rainfall for March in Lambert-St Louis Intl
3.3 ″

Airports servicing Chicago

Chicago Midway (MDW)
Rockford (RFD)

Airports servicing St. Louis

Top 5 airlines flying from Chicago to Lambert-St Louis Intl

Airline Cheapest Average Flexibility On-time COVID-19 safety
Cape Air
$78 $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.

American Airlines
$145 $329 No cancel fee 71%
United Airlines
$145 $371 No cancel fee 69%
Delta
$200 $413 No cancel fee N/A
Linear Air Taxi
$3,825 $5,335 No cancel fee N/A

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

Hourly flight availability from Chicago to Lambert-St Louis Intl

Afternoon Noon to 6 PM 38% of CHI to STL departures
Morning 6 AM to noon 37% of CHI to STL departures
Evening 6 PM to midnight 24% of CHI to STL departures
Early morning Midnight to 6 AM 1% of CHI to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Chicago to Lambert-St Louis Intl
Sunday
32 daily flights
Monday
35 daily flights
Tuesday
26 daily flights
Wednesday
27 daily flights
Thursday
40 daily flights
Friday
38 daily flights
Saturday
22 daily flights
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