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O'Hare Intl

$61+ Cheap flights from St. Louis (STL) to O'Hare Intl (ORD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ORD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Lambert-St Louis to Chicago O'Hare Intl are usually found in August or September, booked 58 days in advance, depart on a Friday or Thursday and return on a Saturday

Cheap flight deals from St. Louis to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$124
(Fly & Visit Rome)

One-way from

$61
(Trip.com)

Popular in

March

Cheapest in

August

Average price

$297

Good round-trip deal

$493 or less

Good one-way deal

$309 or less
Provider with most accurate pricing for Lambert-St Louis-Chicago O'Hare Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Chicago O'Hare Intl flights.
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From Lambert-St Louis to Chicago O'Hare Intl
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One-way flight from Lambert-St Louis to Chicago O'Hare Intl
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Highest demand for flights based on searches. 8% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Lambert-St Louis to Chicago O'Hare Intl.
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Find flight deals from St. Louis to O'Hare Intl

Cheapest flights from St. Louis to O'Hare Intl
Explore the most affordable flight options available from St. Louis to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Fly & Visit Rome deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fly & Visit Rome is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2712:15 pmSTL - ORD
1 stop19h 25mSouthern / Mokulele
Mon 3/38:20 pmORD - STL
1 stop15h 25mSouthern / Mokulele
Deal found 1/20$124
This CheapOair deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/215:20 pmSTL - ORD
1 stop15h 55mFrontier
Tue 2/253:14 pmORD - STL
1 stop8h 29mFrontier
Deal found 1/20$130
This Mytrip deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/55:05 pmSTL - ORD
1 stop16h 22mMultiple Airlines
Wed 3/128:20 pmORD - STL
1 stop15h 25mMultiple Airlines
Deal found 1/20$134
This American Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1311:57 amSTL - ORD
Nonstop1h 22mAmerican Airlines
Mon 2/178:45 pmORD - STL
Nonstop1h 18mAmerican Airlines
Deal found 1/21$139
This Delta deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/136:00 amSTL - ORD
2 stops6h 55mDelta
Mon 2/174:58 pmORD - STL
1 stop4h 51mDelta
Deal found 1/21$182
This United Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/143:32 pmSTL - ORD
Nonstop1h 22mUnited Airlines
Mon 2/172:20 pmORD - STL
Nonstop1h 20mUnited Airlines
Deal found 1/21$228
This Southwest deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/275:20 amSTL - ORD
2 stops8h 40mSouthwest
Tue 3/46:15 amORD - STL
2 stops10h 40mSouthwest
Deal found 1/19$247
This Mytrip deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/234:28 pmSTL - ORD
2 stops18h 52mSpirit Airlines
Thu 1/305:11 amORD - STL
1 stop9h 32mSpirit Airlines
Deal found 1/19$326

Find flights from St. Louis to O'Hare Intl within your budget

Customize your flight search to find flights from St. Louis to O'Hare Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 2/27

12:15 pm-7:40 am

1 stop19h 25m

Chicago O'Hare Intl

Mon 3/3

8:20 pm-11:45 am

1 stop15h 25m

$124

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Fri 2/21

5:20 pm-9:15 am

1 stop15h 55m

Chicago O'Hare Intl

Tue 2/25

3:14 pm-11:43 pm

1 stop8h 29m

$130

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Wed 2/5

5:05 pm-9:27 am

1 stop16h 22m

Chicago O'Hare Intl

Wed 3/12

8:20 pm-11:45 am

1 stop15h 25m

$134

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 2/13

5:45 am-7:09 am

Nonstop1h 24m

Chicago O'Hare Intl

Mon 2/17

8:45 pm-10:03 pm

Nonstop1h 18m

$139

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 2/11

1:15 pm-9:30 pm

1 stop8h 15m

Chicago O'Hare Intl

Wed 2/12

6:15 am-4:55 pm

2 stops10h 40m

$177

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 2/13

6:00 am-12:55 pm

2 stops6h 55m

Chicago O'Hare Intl

Mon 2/17

4:58 pm-9:49 pm

1 stop4h 51m

$182

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 2/13

5:36 pm-6:55 pm

Nonstop1h 19m

Chicago O'Hare Intl

Mon 2/17

2:20 pm-3:40 pm

Nonstop1h 20m

$199

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 2/27

4:00 pm-11:05 am

2 stops19h 05m

Chicago O'Hare Intl

Fri 3/7

6:45 am-9:04 am

3 stops26h 19m

$364

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 2/25

12:15 pm-3:50 pm

1 stop3h 35m

$61

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 2/25

5:20 pm-9:27 am

1 stop16h 07m

$64

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 16 results
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Compare providers for flights from St. Louis to O'Hare Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to O'Hare Intl in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Chicago O'Hare Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Chicago O'Hare Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis to O'Hare Intl

Get recent, data-driven insights about flights from St. Louis to O'Hare Intl including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from St. Louis to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to O'Hare Intl. Price data was last updated on January 17, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Chicago O'Hare Intl Airport, you should look to book at least 58 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Chicago O'Hare Intl Airport (average of $245). Flying from St. Louis to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $320). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to ORD?

Find hourly flight availability from St. Louis to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

It’s typically best to fly out from St. Louis to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 21% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from St. Louis to Chicago O'Hare Intl Airport

Explore weekly flight availability from St. Louis to O'Hare Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 21, 2025.

The most flights from STL to ORD are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 1.7 in.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated January 21, 2025.
Get a feel of what it's like to fly with Southern / Mokulele, Delta and United Airlines from St. Louis to Chicago by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Overall

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Overall

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Overall

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Overall

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Overall

8.1

Boarding

8.2

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Chicago O'Hare Intl?

    If you book a flight to Chicago O'Hare Intl from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 45 flights from Lambert-St Louis to Chicago O'Hare Intl per day from 3 different airlines.

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

    Flying on Southern / Mokulele is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at $124. Additional round-trip tickets that might be worth considering are offered by Frontier and American Airlines, with the lowest prices starting at $130 and $139, respectively. Southern / Mokulele is 53% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Southern / Mokulele. According to our data, you can fly for as low as $61. Users have also found prices from $64 and $69 on Frontier and United Airlines, respectively.

  • What are the most reliable airlines from St. Louis to Chicago O'Hare Intl Airport?

    Before booking your flight to Chicago O'Hare Intl Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: Royal Jordanian (87%), Republic Airways (83%), Envoy Air( 82%).

  • What are the cheapest flights from St. Louis to Chicago O'Hare Intl Airport?

    The cheapest flight price from St. Louis to Chicago O'Hare Intl Airport is $153. On average you can expect to pay $1,479. The most popular route, (Lambert-St Louis - Chicago O'Hare Intl), can usually be booked for $124.

  • Can I find deals for flights from St. Louis to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on St. Louis to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to O'Hare Intl.

  • Can I find deals for business class flights from St. Louis to O'Hare Intl?

    Yes. Cheapflights offers flight deals from St. Louis to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Chicago O'Hare Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Chicago O'Hare Intl Airport (average of $245). Flying from St. Louis to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $320). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

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Top 3 airlines flying from St. Louis to O'Hare Intl

Discover the top 3 airlines that operate flights from St. Louis to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$115Average$261FlexibilityNo cancel feeOn-time71%
Southern / MokuleleCheapest$118Average$183FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$118Average$299FlexibilityNo cancel feeOn-time69%
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