$641 Cheap Flights from Peoria (PIA) to Kos (KGS)

View $641 flight on Sat, Jul 26, 2025Opens in a new window

Popular airlines from Peoria, IL (PIA-Greater Peoria Regional) to Kos (KGS-Kos Island Intl.)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Find available prices by choosing your travel dates.

Cheap Flights from Peoria to Kos (PIA-KGS)

Prices were available within the past 7 days and start at $641 for one-way flights and $1,087 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Jul 23 - Wed, Jul 30
PIA
Peoria
KGS
Kos
$1,087 Roundtrip, found 11 hours ago
$1,087
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Jul 23 from Peoria to Kos, returning Wed, Jul 30, priced at $1,087 found 11 hours ago
United
Wed, Jul 23 - Thu, Jul 31
PIA
Peoria
KGS
Kos
$1,098 Roundtrip, found 11 hours ago
$1,098
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Jul 23 from Peoria to Kos, returning Thu, Jul 31, priced at $1,098 found 11 hours ago
United
Thu, Jul 24 - Wed, Jul 30
PIA
Peoria
KGS
Kos
$1,147 Roundtrip, found 11 hours ago
$1,147
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Jul 24 from Peoria to Kos, returning Wed, Jul 30, priced at $1,147 found 11 hours ago
United
Thu, Jul 24 - Mon, Jul 28
PIA
Peoria
KGS
Kos
$1,148 Roundtrip, found 11 hours ago
$1,148
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Jul 24 from Peoria to Kos, returning Mon, Jul 28, priced at $1,148 found 11 hours ago
United
Thu, Jul 24 - Thu, Jul 31
PIA
Peoria
KGS
Kos
$1,160 Roundtrip, found 11 hours ago
$1,160
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Jul 24 from Peoria to Kos, returning Thu, Jul 31, priced at $1,160 found 11 hours ago
United
Fri, Jul 25 - Wed, Jul 30
PIA
Peoria
KGS
Kos
$1,192 Roundtrip, found 11 hours ago
$1,192
Roundtrip
found 11 hours ago
Select United flight, departing Fri, Jul 25 from Peoria to Kos, returning Wed, Jul 30, priced at $1,192 found 11 hours ago
United
Fri, Jul 25 - Mon, Jul 28
PIA
Peoria
KGS
Kos
$1,193 Roundtrip, found 11 hours ago
$1,193
Roundtrip
found 11 hours ago
Select United flight, departing Fri, Jul 25 from Peoria to Kos, returning Mon, Jul 28, priced at $1,193 found 11 hours ago
United
Fri, Jul 25 - Thu, Jul 31
PIA
Peoria
KGS
Kos
$1,205 Roundtrip, found 11 hours ago
$1,205
Roundtrip
found 11 hours ago
Select United flight, departing Fri, Jul 25 from Peoria to Kos, returning Thu, Jul 31, priced at $1,205 found 11 hours ago
Lufthansa
Sat, Jul 26 - Fri, Aug 1
PIA
Peoria
KGS
Kos
$1,412 Roundtrip, found 11 hours ago
$1,412
Roundtrip
found 11 hours ago
Select Lufthansa flight, departing Sat, Jul 26 from Peoria to Kos, returning Fri, Aug 1, priced at $1,412 found 11 hours ago
American Airlines
Fri, Jul 25 - Tue, Jul 29
PIA
Peoria
KGS
Kos
$1,476 Roundtrip, found 11 hours ago
$1,476
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Fri, Jul 25 from Peoria to Kos, returning Tue, Jul 29, priced at $1,476 found 11 hours ago

Frequently asked questions

How much does a flight from Greater Peoria Regional Airport (PIA) to Kos Island Intl. Airport (KGS) cost?
Discover the latest flight deals from PIA to KGS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from PIA to KGS?
The cheapest flights from PIA to KGS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PIA to KGS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from PIA to KGS. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Greater Peoria Regional Airport (PIA) to Kos Island Intl. Airport (KGS)?
Nonstop flights from Greater Peoria Regional Airport (PIA) to Kos Island Intl. Airport (KGS) aren’t available daily, so you’ll need to take a flight with a layover. Explore your options with Expedia’s filters. Enter your travel details and select either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from PIA to KGS?
Typically you’ll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can vary based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Greater Peoria Regional Airport (PIA) to Kos Island Intl. Airport (KGS)?
To land at Kos Island Intl. Airport (KGS) on time, book a flight that leaves from Greater Peoria Regional Airport (PIA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Greater Peoria Regional Airport (PIA) to Kos Island Intl. Airport (KGS) last-minute?
Booking your ticket from PIA to KGS shortly before your trip is generally more expensive. But if you’re flexible with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a PIA to KGS flight and hotel package?
Compared with arranging flights and hotels separately, booking a PIA to KGS flight and hotel package with Expedia could result in significant savings. What’s more, managing everything in one place will take the hassle out of planning your trip. Just pick your flights and choose from our wide range of stays, then personalize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Greater Peoria Regional Airport (PIA) to Kos Island Intl. Airport (KGS)?
Generally, it’s possible to cancel or reschedule your PIA to KGS flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline’s policies in your itinerary to see what changes are possible and if any costs are involved. You’ll also find more information on our Customer Service portal.
*Available to One Key members.