What is the cheapest airline to fly from New Haven to St. Louis round-trip?

According to our current data, Avelo Airlines ($136), offers the cheapest pricing from New Haven to St. Louis.

What is the cheapest day to fly from New Haven to St. Louis?

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

In terms of precipitation, rainfall in St. Louis 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. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, 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).

What is the cheapest day to fly round-trip from New Haven to St. Louis?

Wednesday is generally a great day to depart. Flying on this day could help you save up to 66%.

How far in advance should I book a flight from New Haven to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 57 days in advance, which can save you up to 64% on flights from New Haven to St. Louis compared to booking the week you need them. Waiting 57 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 $333. For sooner than that we have options available in the next 3 days from $395.

What is the cheapest month to fly from New Haven to St. Louis?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, January can be a great choice for travel to St. Louis. Flights to St. Louis from New Haven in January are about $334 on average during January, but can be found for as low as $207.

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

It’s optimal to fly from New Haven to St. Louis in the morning. By choosing this option you can save up to 40% on the cost of your flight, compared to a flight at noon.

Can I find deals for flights from New Haven to St. Louis that include hotel bookings?

Yes. In addition to deals on New Haven to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from New Haven to St. Louis?

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

Can I find deals for business class flights from New Haven to St. Louis?

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

$207+ Cheap Flights from New Haven to St. Louis

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Cheap flight deals from New Haven to St. Louis

Round-trip from	$344 (Booking.com)
One-way from	$216 (Mytrip)
Popular in	December
Cheapest in	January
Average price	$339

From Tweed-New Haven to Lambert-St Louis

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One-way flight from Tweed-New Haven to Lambert-St Louis

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Highest demand for flights based on searches. 8% potential increase in price ($32 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from New Haven to St. Louis

Cheapest flights from New Haven to St. Louis
Explore the most affordable flight options available from New Haven to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2025.

Mon 9/2210:30 amHVN - STL

2 stops9h 06mMultiple Airlines

Thu 9/259:50 amSTL - HVN

2 stops9h 00mMultiple Airlines

Deal found 8/25

$344

Mon 11/310:30 amHVN - STL

2 stops9h 06mMultiple Airlines

Fri 11/79:50 amSTL - HVN

3 stops27h 29mMultiple Airlines

Deal found 8/25

$430

Best flights from New Haven to St. Louis
Discover carefully curated flight deals from New Haven to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2025.

Thu 9/257:30 amHVN - STL

1 stop8h 34mMultiple Airlines

Sun 9/284:00 pmSTL - HVN

1 stop19h 06mMultiple Airlines

Deal found 8/26

$207

Mon 9/2210:30 amHVN - STL

2 stops9h 06mMultiple Airlines

Thu 9/259:50 amSTL - HVN

2 stops9h 00mMultiple Airlines

Deal found 8/25

$344

Wed 9/107:30 amHVN - STL

2 stops27h 10mMultiple Airlines

Sun 9/1410:35 amSTL - HVN

3 stops28h 31mMultiple Airlines

Deal found 8/26

$384

Fri 9/268:00 amHVN - STL

2 stops26h 06mMultiple Airlines

Sun 9/281:52 pmSTL - HVN

1 stop7h 43mMultiple Airlines

Deal found 8/26

$404

Mon 11/310:30 amHVN - STL

2 stops9h 06mMultiple Airlines

Fri 11/79:50 amSTL - HVN

3 stops27h 29mMultiple Airlines

Deal found 8/25

$430

Last-minute flights from New Haven to St. Louis
Discover last-minute flight deals from New Haven to St. Louis. Data last updated August 26, 2025 and is based on user searches.

Mon 9/2210:30 amHVN - STL

2 stops9h 06mMultiple Airlines

Thu 9/259:50 amSTL - HVN

2 stops9h 00mMultiple Airlines

Deal found 8/25

$344

One-way flights from New Haven to St. Louis
Search for one-way flight options from New Haven to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 26, 2025.

Wed 9/37:30 amHVN - STL

2 stops27h 10mMultiple Airlines

Deal found 8/26

$216

Cheapflights Fare Finder

Use the filters below to find and compare flights from New Haven to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

New HavenSt. Louis

HVN - STL

HVNSTL

Tweed-New Haven

Thu 9/25

7:30 am-3:04 pm

1 stop8h 34m

Lambert-St Louis

Sun 9/28

4:00 pm-12:06 pm

1 stop19h 06m

$207

New HavenSt. Louis

HVN - STL

HVNSTL

Tweed-New Haven

Mon 9/22

10:30 am-6:36 pm

2 stops9h 06m

Lambert-St Louis

Thu 9/25

9:50 am-7:50 pm

2 stops9h 00m

$344

New HavenSt. Louis

HVN - STL

HVNSTL

Tweed-New Haven

Wed 9/10

7:30 am-9:40 am

2 stops27h 10m

Lambert-St Louis

Sun 9/14

10:35 am-4:06 pm

3 stops28h 31m

$384

New HavenSt. Louis

HVN - STL

HVNSTL

Tweed-New Haven

Fri 9/26

8:00 am-9:06 am

2 stops26h 06m

Lambert-St Louis

Sun 9/28

1:52 pm-10:35 pm

1 stop7h 43m

$404

New HavenSt. Louis

HVN - STL

HVNSTL

Tweed-New Haven

Mon 11/3

10:30 am-6:36 pm

2 stops9h 06m

Lambert-St Louis

Fri 11/7

9:50 am-2:19 pm

3 stops27h 29m

$430

New HavenSt. Louis

HVN - STL

HVNSTL

Tweed-New Haven

Wed 9/3

7:30 am-9:40 am

2 stops27h 10m

$216

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/26

Best time to book a flight from New Haven to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from New Haven 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.

Cheapflights Insights

Everything you need to know about your flight from New Haven to St. Louis

What is the cheapest month to book a flight from New Haven to St. Louis?

Currently, August is the cheapest month in which you can book a flight from New Haven to St. Louis (average of $311). Flying from New Haven to St. Louis 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.

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Avelo Airlines from New Haven to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Avelo Airlines

7.5

Good

Reviews

1 / 6

2.0

Mediocre

Cindy,Sep 2023

MCO - DAY

I was emailed and told that if I check my luggage early I get a 10 dollar discount, also on the website, if it's under 50 lbs. it would be $40.00 I was charged $65.00 on first flight and $60.00 on second flight (second flight I checked in early, did not receive the discount, both flights my luggage was under 40 lbs.). Avelo destroyed my luggage, wheels were tore off, and plastic was ripped off.

Avelo Airlines

7.5

Good

Avelo Airlines

7.5

Good

Reviews

1 / 6

2.0

Mediocre

Cindy,Sep 2023

MCO - DAY

Related info for your journey

What is the cheapest airline to fly from New Haven to St. Louis round-trip?
According to our current data, Avelo Airlines ($136), offers the cheapest pricing from New Haven to St. Louis.
Can I find deals for flights from New Haven to St. Louis that include hotel bookings?
Yes. In addition to deals on New Haven to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from New Haven to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from New Haven to St. Louis.
Can I find deals for business class flights from New Haven to St. Louis?
Yes. Cheapflights offers flight deals from New Haven to St. Louis 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 New Haven to St. Louis?
Currently, August is the cheapest month in which you can book a flight from New Haven to St. Louis (average of $311). Flying from New Haven to St. Louis 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

O'Fallon

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Maryland Heights

Collinsville

Eureka

St. Peters

Glencoe

Alton

Chesterfield

Farmington

Festus

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Top airline flying from New Haven to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Avelo Airlines	Cheapest$136	Average$172	FlexibilityNo cancel fee	On-timeN/A

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$207+ Cheap flights from New Haven to St. Louis (HVN - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/25. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from New Haven to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from New Haven to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from New Haven to St. Louis

Cheapest flights from New Haven to St. LouisExplore the most affordable flight options available from New Haven to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2025.

Explore the most affordable flight options available from New Haven to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from New Haven to St. Louis that are best for you.

Best time to book a flight from New Haven to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from New Haven with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from New Haven to St. Louis

What is the cheapest month to book a flight from New Haven to St. Louis?

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Avelo Airlines from New Haven to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What is the cheapest airline to fly from New Haven to St. Louis round-trip?

Can I find deals for flights from New Haven to St. Louis that include hotel bookings?

How can I find direct flights from New Haven to St. Louis?

Can I find deals for business class flights from New Haven to St. Louis?

What is the cheapest month to book a flight from New Haven to St. Louis?

Traveling to a place near St. Louis?

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Alternative routes for New Haven to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from New Haven to St. Louis

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Travel Smart

Cheapest flights from New Haven to St. Louis
Explore the most affordable flight options available from New Haven to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2025.