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Find cheap flights from Watertown to Illinois from $308

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Watertown to Illinois departing on 8/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Tue 6/18
Tue 6/25

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Best Illinois Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

St. Louis
St. Louis1 stop$308

Good to know

Cheapest flight

$308
Flight from Watertown to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Watertown to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Watertown to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Watertown to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from Watertown is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Watertown to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Illinois with an airline and back to Watertown with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Watertown to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Illinois from Watertown up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Illinois

  • Morning departure is around 17% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Book cheap flights from Watertown to Illinois

Recent round-trip flight deals

8/16Fri
1 stopAmerican Airlines
4h 36mART-STL
8/18Sun
1 stopAmerican Airlines
5h 44mSTL-ART
$308
8/16Fri
2 stopsAmerican Airlines
10h 18mART-STL
8/18Sun
1 stopAmerican Airlines
5h 44mSTL-ART
$313
6/15Sat
2 stopsAmerican Airlines
9h 10mART-ORD
6/29Sat
1 stopAmerican Airlines
6h 55mORD-ART
$475
9/12Thu
1 stopAmerican Airlines
6h 34mART-ORD
9/16Mon
1 stopAmerican Airlines
5h 42mORD-ART
$480
9/12Thu
2 stopsAmerican Airlines
8h 44mART-ORD
9/16Mon
1 stopAmerican Airlines
4h 07mORD-ART
$485
6/15Sat
1 stopAmerican Airlines
5h 39mART-ORD
6/29Sat
1 stopAmerican Airlines
6h 55mORD-ART
$490
6/14Fri
2 stopsAmerican Airlines
8h 29mART-ORD
6/28Fri
1 stopAmerican Airlines
5h 10mORD-ART
$495
8/16Fri
2 stopsAmerican Airlines
10h 18mART-STL
8/18Sun
2 stopsAmerican Airlines
12h 36mSTL-ART
$496
6/16Sun
1 stopAmerican Airlines
7h 12mART-ORD
6/30Sun
1 stopAmerican Airlines
6h 55mORD-ART
$500
6/14Fri
1 stopAmerican Airlines
6h 53mART-ORD
6/28Fri
1 stopAmerican Airlines
5h 10mORD-ART
$510

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Watertown - Illinois Flights

Departure:

Watertown (ART)United States

Return flight deals:

Illinois - Watertown

Cabin classes: