$254+ Cheap flights from Watertown, NY (ART) to Illinois
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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Watertown to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Watertown to Illinois
Keep the following information in mind while searching for Watertown to Illinois flight deals. Data was last updated May 1, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $254 (American Airlines) |
Find flight deals from Watertown to Illinois
Cheapest flights from Watertown to IllinoisExplore the most affordable flight options available from Watertown to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.
Explore the most affordable flight options available from Watertown to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.
This American Airlines deal was found by Cheapflights users on 4/30. 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.
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Watertown to Illinois 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 May 1, 2025.
Use the filters below to find and compare flights from Watertown to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
WatertownSt. Louis
ART - STL
ARTSTL
Watertown
Thu 5/15
6:05 am-3:11 pm
2 stops10h 06m
Lambert-St Louis
Mon 5/19
6:00 am-1:16 pm
1 stop6h 16m
WatertownSt. Louis
ART - STL
ARTSTL
Watertown
Fri 8/15
3:33 pm-2:26 pm
2 stops23h 53m
Lambert-St Louis
Mon 8/18
7:32 pm-11:06 pm
2 stops26h 34m
Best time to book a flight from Watertown to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Watertown with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Watertown to Illinois
What is the cheapest month to book a flight from Watertown, New York to Illinois?
Currently, August is the cheapest month in which you can book a flight from Watertown, New York to Illinois (average of $245). Flying from Watertown, New York to Illinois in March is currently the most expensive (average of $321). 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.
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois 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 Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, 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 Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated May 1, 2025.
Overall
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Food
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James,Apr 2025
LAX - SFO
Overall
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Food
Entertainment
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James,Apr 2025
LAX - SFO
Overall
Boarding
Food
Entertainment
Crew
Comfort
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James,Apr 2025
LAX - SFO