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Cheap flights from Chicago O'Hare Intl Airport to Estonia from $421

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Estonia departing on 8/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Chicago O'Hare Intl Airport to Estonia

Cheap round-trip flights

Scandinavian Airlines Logo
7:15 pm - 1:25 amORD-TLL
22h 10m1 stop
Scandinavian Airlines Logo
8:00 pm - 4:10 pmTLL-ORD
28h 10m2 stops
$434Scandinavian Airlines
Find Deal
Mon, Oct 6 - Wed, Oct 22
Scandinavian Airlines Logo
7:20 pm - 3:10 pmORD-TLL
11h 50m1 stop
Scandinavian Airlines Logo
4:10 pm - 4:45 pmTLL-ORD
32h 35m2 stops
$437Scandinavian Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 23
United Airlines Logo
1:36 pm - 4:50 pmORD-TLL
19h 14m2 stops
United Airlines Logo
1:55 pm - 8:05 pmTLL-ORD
14h 10m1 stop
$500United Airlines
Find Deal
Tue, Nov 4 - Wed, Nov 19
United Airlines Logo
10:30 pm - 12:20 amORD-TLL
17h 50m1 stop
United Airlines Logo
6:00 am - 12:55 pmTLL-ORD
14h 55m1 stop
$501United Airlines
Find Deal
Mon, Sep 8 - Tue, Sep 23
Logo
10:40 am - 1:05 pmORD-TLL
18h 25m2 stops
Logo
6:00 am - 12:55 pmTLL-ORD
14h 55m1 stop
$504
Find Deal
Mon, Sep 8 - Tue, Sep 23
Logo
12:00 pm - 12:50 pmORD-TLL
16h 50m2 stops
Logo
6:00 am - 3:55 pmTLL-ORD
17h 55m1 stop
$517
Find Deal
Tue, Sep 9 - Tue, Sep 16
Finnair Logo
8:35 pm - 7:45 pmORD-TLL
15h 10m2 stops
Finnair Logo
10:00 am - 7:15 pmTLL-ORD
17h 15m2 stops
$540Finnair
Find Deal
Sun, Aug 31 - Tue, Sep 16
Lufthansa Logo
10:30 pm - 12:20 amORD-TLL
17h 50m1 stop
Lufthansa Logo
6:50 pm - 12:55 pmTLL-ORD
26h 05m1 stop
$578Lufthansa
Find Deal
Mon, Sep 1 - Tue, Sep 16
Lufthansa Logo
9:40 pm - 6:25 pmORD-TLL
12h 45m1 stop
Lufthansa Logo
6:50 pm - 7:55 pmTLL-ORD
33h 05m1 stop
$581Lufthansa
Find Deal
Sun, Sep 21 - Wed, Oct 1
Finnair Logo
8:35 pm - 7:45 pmORD-TLL
15h 10m2 stops
Finnair Logo
10:55 am - 7:15 pmTLL-ORD
16h 20m2 stops
$590Finnair
Find Deal
Sun, Aug 31 - Tue, Sep 16

Air Canada flights from Chicago O'Hare Intl Airport to Estonia

Our best Air Canada deals on Chicago O'Hare Intl Airport to Estonia flight tickets
Air Canada
Sep 8
ORD10:40 amChicago O'Hare Intl
18h 25m
2 stops
TLL1:05 pmTallinn
Sep 23
TLL7:30 amTallinn
20h 41m
2 stops
ORD8:11 pmChicago O'Hare Intl
$519
Find similar
Air Canada
Sep 21
ORD8:40 amChicago O'Hare Intl
20h 25m
2 stops
TLL1:05 pmTallinn
Sep 30
TLL7:20 amTallinn
20h 51m
2 stops
ORD8:11 pmChicago O'Hare Intl
$576
Find similar
Air Canada
Sep 1
ORD8:40 amChicago O'Hare Intl
27h 15m
2 stops
TLL7:55 pmTallinn
Sep 16
TLL7:20 amTallinn
15h 35m
2 stops
ORD2:55 pmChicago O'Hare Intl
$599
Find similar

Finnair flights from Chicago O'Hare Intl Airport to Estonia

Our best Finnair deals on Chicago O'Hare Intl Airport to Estonia flight tickets
Finnair
Aug 31
ORD8:35 pmChicago O'Hare Intl
15h 10m
2 stops
TLL7:45 pmTallinn
Sep 16
TLL10:00 amTallinn
17h 15m
2 stops
ORD7:15 pmChicago O'Hare Intl
$540
Find similar
Finnair
Aug 31
ORD8:35 pmChicago O'Hare Intl
15h 10m
2 stops
TLL7:45 pmTallinn
Sep 16
TLL10:55 amTallinn
16h 20m
2 stops
ORD7:15 pmChicago O'Hare Intl
$590
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Estonia 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, momondo users made 832,500 searches. Data last updated August 13, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Estonia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Mon 10/6

7:15 pm-1:25 am

1 stop22h 10m

Tallinn

Wed 10/22

8:00 pm-4:10 pm

2 stops28h 10m

$434

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Thu 11/6

7:20 pm-3:10 pm

1 stop11h 50m

Tallinn

Sun 11/23

4:10 pm-4:45 pm

2 stops32h 35m

$437

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Tue 11/4

1:36 pm-4:50 pm

2 stops19h 14m

Tallinn

Wed 11/19

1:55 pm-8:05 pm

1 stop14h 10m

$500

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Mon 9/8

10:30 pm-12:20 am

1 stop17h 50m

Tallinn

Tue 9/23

6:00 am-12:55 pm

1 stop14h 55m

$501

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Mon 9/8

10:40 am-1:05 pm

2 stops18h 25m

Tallinn

Tue 9/23

6:00 am-12:55 pm

1 stop14h 55m

$504

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Tue 9/9

12:00 pm-12:50 pm

2 stops16h 50m

Tallinn

Tue 9/16

6:00 am-3:55 pm

1 stop17h 55m

$517

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Sun 8/31

8:35 pm-7:45 pm

2 stops15h 10m

Tallinn

Tue 9/16

10:00 am-7:15 pm

2 stops17h 15m

$540

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Mon 9/1

10:30 pm-12:20 am

1 stop17h 50m

Tallinn

Tue 9/16

6:50 pm-12:55 pm

1 stop26h 05m

$578

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Sun 9/21

9:40 pm-6:25 pm

1 stop12h 45m

Tallinn

Wed 10/1

6:50 pm-7:55 pm

1 stop33h 05m

$581

ChicagoTallinn

ORD - TLL

ORDTLL

Chicago O'Hare Intl

Sun 8/31

8:35 pm-7:45 pm

2 stops15h 10m

Tallinn

Tue 9/16

10:55 am-7:15 pm

2 stops16h 20m

$590

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Estonia from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Estonia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Estonia?

The cheapest month to fly to Estonia from Chicago O'Hare Intl Airport is in October. Flight prices, which tend to average around $517, are often lower during this time because this is during the off-season. If you’re not able to fly to Estonia in October, then April is your next best option. Flight prices from Chicago O'Hare Intl Airport to Estonia during April average around $548.

What is the cheapest day to depart on your flight to Estonia?

On average, the least expensive day to fly to Estonia from Chicago O'Hare Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $651. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Estonia on Monday is $962.

What is the cheapest time of day to depart on your flight to Estonia?

Our data shows that the cheapest Chicago O'Hare Intl Airport to Estonia flights are usually those with departure times in the evening. Our users have found flights to Estonia in the evening for as low as $702. Try not to purchase tickets at noon because they tend to be around $851. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Chicago O'Hare Intl Airport to Estonia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Estonia

Best Price Found

$421

Fastest flight time

11h 50m

Direct flights

None

Airports in Estonia

1 airport
The best one-way flight to Estonia from Chicago O'Hare Intl Airport in the past 72 hours is $421. The best round-trip flight deal from Chicago O'Hare Intl Airport to Estonia found on momondo in the last 72 hours is $434.
The fastest flight from Chicago O'Hare Intl Airport to Estonia takes 11h 50m
There are no direct flights from Chicago O'Hare Intl Airport to Estonia. Popular non-direct route for this connection is Chicago O'Hare Intl Airport - Tallinn Airport.
There is 1 airport near Estonia: Tallinn (TLL)
Search flight deals

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Estonia?

    Prices for flights from Chicago O'Hare Intl Airport to Estonia were last updated today.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Estonia?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Estonia?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago O'Hare Intl Airport to Estonia.

  • What documentation or ID do you need to fly to Estonia?

    The required travel and health documents for your Estonia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Estonia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Chicago O'Hare Intl Airport to Estonia

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Estonia with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $424Free CancellationRating
7.4
1,466 reviews
Search Scandinavian Airlines flights
FinnairPriceFrom $507Free CancellationRating
7.6
1,321 reviews
Search Finnair flights
United AirlinesPriceFrom $528Free CancellationRating
7.4
8,920 reviews
Search United Airlines flights
LufthansaPriceFrom $535Free CancellationRating
6.8
7,317 reviews
Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Estonia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Estonia from Chicago.

Can I find flights from Chicago to Estonia with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Chicago to Estonia flights to just show those with flexible booking policies.

How can momondo help me find flights from Chicago to Estonia?

momondo provides multiple filters to help you find the best flight to Estonia from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Chicago to Estonia right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Chicago to Estonia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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