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St. Charles

$54+ Cheap flights from Boston (BOS) to St. Charles, MO

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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — STL
Nov 9 — Nov 161
Sat 11/9
Sat 11/16
1 adult, Economy
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The best prices from Boston Logan Intl to St. Charles are usually found in February or September, booked 63 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Boston to St. Charles

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to St. Charles (CH5). 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 November 4, 2024.

Popular in

March

Cheapest in

February

Round-trip from

$107
(Mytrip)

One-way from

$54
(Frontier)
High demand for flights, 11% potential price rise
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Best time to find cheap flights, 18% potential price drop
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From Boston Logan Intl to St. Charles
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One-way flight from Boston Logan Intl to St. Charles
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Find flight deals from Boston to St. Charles

Cheapest flights from Boston to St. Charles
Explore the most affordable flight options available from Boston to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2024.

This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1111:24 amBOS - STL
1 stop9h 14mFrontier
Thu 12/55:02 pmSTL - BOS
1 stop6h 28mFrontier
Deal found 11/3$308
This FareScan deal was found by Cheapflights users on 11/3. 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 FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/136:30 amBOS - STL
2 stops35h 04mSpirit Airlines
Sat 11/165:29 pmSTL - BOS
2 stops19h 20mSpirit Airlines
Deal found 11/3$310
This Mytrip deal was found by Cheapflights users on 11/3. 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 12/119:57 amBOS - STL
3 stops31h 48mMultiple Airlines
Sun 12/1512:00 pmSTL - BOS
3 stops35h 38mMultiple Airlines
Deal found 11/3$314
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Sat 11/232:53 pmBOS - STL
1 stop8h 07mAmerican Airlines
Fri 11/299:20 amSTL - BOS
Nonstop2h 35mAmerican Airlines
Deal found 11/4$361
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Sat 11/236:00 amBOS - STL
1 stop7h 19mUnited Airlines
Fri 11/296:00 amSTL - BOS
1 stop5h 26mUnited Airlines
Deal found 11/3$370
This Southwest deal was found by Cheapflights users on 11/3. 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.
Tue 12/38:00 amBOS - STL
Nonstop3h 10mSouthwest
Tue 12/33:05 pmSTL - BOS
2 stops6h 20mSouthwest
Deal found 11/3$436
This Delta deal was found by Cheapflights users on 11/3. 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.
Mon 12/236:35 pmBOS - STL
1 stop6h 05mDelta
Thu 12/265:55 pmSTL - BOS
1 stop4h 56mDelta
Deal found 11/3$440

Find flights from Boston to St. Charles within your budget

Customize your flight search to find flights from Boston to St. Charles 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 2,455,398 searches. Data last updated November 4, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 11/26

6:00 am-7:41 am

1 stop26h 41m

$144

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 11/11

12:11 pm-4:34 pm

1 stop29h 23m

$147

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 12/31

6:05 am-8:43 pm

2 stops15h 38m

$158

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 12/5

12:35 pm-4:45 pm

3 stops29h 10m

$160

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 11/25

6:25 am-8:43 am

Nonstop3h 18m

$176

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 12/25

12:20 pm-7:25 pm

2 stops8h 05m

$190

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 11/28

6:00 am-2:12 pm

2 stops9h 12m

$230

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 3/9

6:35 pm-11:59 pm

2 stops30h 24m

$267

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 12/17

5:00 am-3:21 pm

1 stop11h 21m

Lambert-St Louis

Wed 1/1

12:00 pm-11:15 pm

3 stops34h 15m

$308

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 12/11

9:34 am-3:21 pm

3 stops30h 47m

Lambert-St Louis

Sun 12/15

4:26 pm-8:48 pm

2 stops27h 22m

$310

Flights are sorted by cheapest first

Deals found on 11/3

Showing 1-10 of 15 results
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Best time to book a flight from Boston to St. Charles

Have a flexible travel schedule? Discover the best time to fly to St. Charles from Boston 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 Boston to St. Charles

Get recent, data-driven insights about flights from Boston to St. Charles including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Boston to St. Charles?

Use this chart to determine the optimal time to book a round-trip flight from Boston to St. Charles. Price data was last updated on November 1, 2024.

To ensure you get the cheapest price possible for a flight from Boston to St. Charles, you should look to book at least 63 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.

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What is the cheapest month to book a flight from Boston to St. Charles?

Currently, September is the cheapest month in which you can book a flight from Boston to St. Charles (average of $308). Flying from Boston to St. Charles in March is currently the most expensive (average of $356). 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 BOS to CH5?

Find hourly flight availability from Boston to St. Charles. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2024.

When flying from Boston to St. Charles, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Boston to St. Charles?

Use this chart to determine the cheapest time to fly round-trip from Boston to St. Charles. Price data was last updated on June 16, 2024.

Travelers seeking maximum savings on their Boston to St. Charles flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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Rainfall in St. Charles by month

Plan your trip to St. Charles by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Charles ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Charles when rainfall is around 2.2 in.

Temperature in St. Charles by month

Plan your trip to St. Charles by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Charles, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Charles

Get insights into the airlines that provide service to St. Charles. 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 St. Charles. Reviews last updated November 4, 2024.
Peruse reviews from past customers who have flown with Frontier, Spirit Airlines and American Airlines from Boston to St. Charles to help guide your decision. 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
5,089 reviews

Entertainment

7.7

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.3

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,089 reviews
Southwest
8.1
Very good
5,089 reviews

Entertainment

7.7

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.3

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,423 reviews
Southwest
8.1
Very good
5,089 reviews

Entertainment

7.7

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.3

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,829 reviews
Southwest
8.1
Very good
5,089 reviews

Entertainment

7.7

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.3

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,226 reviews
Southwest
8.1
Very good
5,089 reviews

Entertainment

7.7

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.3

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,089 reviews

Entertainment

7.7

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.3

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Boston to St. Charles. 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 Boston to St. Charles?

    Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to St. Charles. You should not have trouble finding flights to St. Charles from Logan Intl; the airport handles an average of 3 outbound flights to St. Charles per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Boston airport to St. Charles. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.

  • Can I find flights from Boston to St. Charles for under $200 on Cheapflights?

    Yes, there are multiple flights from Boston to St. Charles for under $200. The cheapest flight booked recently is on Frontier for just $107, but on average you can expect to pay $218.

  • Are there nonstop flights from Boston to St. Charles for under $400 on Cheapflights?

    Cheapflights has at least 2 direct flights from Boston to St. Charles under $400. A good price for a nonstop flight from Boston to St. Charles is less than $404.

  • Are there last-minute flights available from Boston to St. Charles for under $400?

    There are currently 8+ open flights from Boston to St. Charles within the next 7 days for less than $400.

  • How popular is this Boston to St. Charles flight route?

    The Boston Logan Intl to St. Charles flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from Boston to St. Charles one-way?

    The cheapest airlines for a one-way flight from Boston to St. Charles are Frontier ($54), Spirit Airlines ($76), and Delta ($158).

  • What are the most reliable airlines from Boston to St. Charles?

    No one likes to see their flight delayed. When booking a flight from Boston to St. Charles consider choosing Qatar Airways (88%), Southwest (84%) or American Airlines (84%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Boston to St. Charles?

    Looking at all options, your cheapest flight can be booked for $135. While the most popular route (Boston Logan Intl - Lambert-St Louis) can be booked for $123 on average our data indicates $347 when flying from Boston to St. Charles.

  • What does BOS to STL mean?

    BOS stands for Boston Logan Intl Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Columbia Regional Airport (COU), Springfield Capital Airport (SPI), Belleville Airport (BLV), Quincy Regional Airport (UIN) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Boston to St. Charles that include extra baggage allowance?

    The amount of baggage you can bring on your Boston to St. Charles flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Boston to St. Charles with specific airlines?

    Yes, Cheapflights allows you to browse and filter Boston to St. Charles flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Boston to St. Charles that include hotel bookings?

    Yes. In addition to deals on Boston to St. Charles flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to St. Charles?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to St. Charles.

  • Can I find deals for business class flights from Boston to St. Charles?

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

  • Can I find deals for flights from Boston to St. Charles that allow pets onboard?

    Many airlines flying from Boston to St. Charles offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Boston to St. Charles?

    Yes, you can often find last-minute deals on Boston to St. Charles flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Boston to St. Charles flight deals updated?

    The Boston to St. Charles flight deals you see on this page were last updated on 11/4.

  • What is the cheapest month to book a flight from Boston to St. Charles?

    Currently, September is the cheapest month in which you can book a flight from Boston to St. Charles (average of $308). Flying from Boston to St. Charles in March is currently the most expensive (average of $356). 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

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Top 6 airlines flying from Boston to St. Charles

Discover the top 6 airlines that operate flights from Boston to St. Charles. 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 2,455,398 searches. Data last updated November 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$138Average$200FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$144Average$270FlexibilityNo cancel feeOn-time65%
DeltaCheapest$196Average$390FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$255Average$539FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$283Average$501FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$294Average$410FlexibilityNo cancel feeOn-time63%
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