Austrian Airlines Flight OS66 Deals & Information (2025/2026)

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Austrian Airlines Flight 66 Route Deals From $439

The cheapest prices found with in the last 7 days for return flights were $549 and $439 for one-way flights to Vienna Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Nov 17 - Wed, Nov 26
ORD
O'Hare Intl.
VIE
Vienna Intl.
$549 Roundtrip, found 7 hours ago
$549
Roundtrip
found 7 hours ago
Select Austrian Airlines flight, departing Mon, Nov 17 from O'Hare Intl. to Vienna Intl., returning Wed, Nov 26, priced at $549 found 7 hours ago
Sun, Nov 23 - Fri, Dec 5
ORD
O'Hare Intl.
VIE
Vienna Intl.
$553 Roundtrip, found 2 days ago
$553
Roundtrip
found 2 days ago
Select Austrian Airlines flight, departing Sun, Nov 23 from O'Hare Intl. to Vienna Intl., returning Fri, Dec 5, priced at $553 found 2 days ago
Mon, Nov 17 - Wed, Nov 26
ORD
O'Hare Intl.
VIE
Vienna Intl.
$553 Roundtrip, found 7 hours ago
$553
Roundtrip
found 7 hours ago
Select Austrian Airlines flight, departing Mon, Nov 17 from O'Hare Intl. to Vienna Intl., returning Wed, Nov 26, priced at $553 found 7 hours ago
Mon, Oct 27 - Tue, Nov 4
ORD
O'Hare Intl.
VIE
Vienna Intl.
$558 Roundtrip, found 1 day ago
$558
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Mon, Oct 27 from O'Hare Intl. to Vienna Intl., returning Tue, Nov 4, priced at $558 found 1 day ago
Mon, Jan 26 - Wed, Feb 11
ORD
O'Hare Intl.
VIE
Vienna Intl.
$566 Roundtrip, found 9 hours ago
$566
Roundtrip
found 9 hours ago
Select Austrian Airlines flight, departing Mon, Jan 26 from O'Hare Intl. to Vienna Intl., returning Wed, Feb 11, priced at $566 found 9 hours ago
Mon, Dec 1 - Mon, Dec 22
ORD
O'Hare Intl.
VIE
Vienna Intl.
$568 Roundtrip, just found
$568
Roundtrip
just found
Select Austrian Airlines flight, departing Mon, Dec 1 from O'Hare Intl. to Vienna Intl., returning Mon, Dec 22, priced at $568 just found
Mon, Nov 10 - Tue, Nov 18
ORD
O'Hare Intl.
VIE
Vienna Intl.
$572 Roundtrip, just found
$572
Roundtrip
just found
Select Austrian Airlines flight, departing Mon, Nov 10 from O'Hare Intl. to Vienna Intl., returning Tue, Nov 18, priced at $572 just found

Frequently asked questions

What route does flight number OS66 take?
OS66 takes approximately 9 hours and 5 minutes to fly straight from ORD to Vienna Airport (VIE-Vienna Intl.). Sure, there’s magic in the destination, but the journey is always half the fun!
How often is OS66 on time?
Austrian Airlines flight number OS66 departs on schedule on 66% of its journeys. We recommend leaving a bit of space in your itinerary if you are boarding this flight. If there is a set back, you can expect to wait around 18 minutes. This route has a star rating of 1.9.
What terminal does OS66 fly out of?
You’ll likely be departing from Terminal 5 if you’re traveling on OS66 direct from O’Hare Intl. Airport (ORD) to Vienna Intl. Airport (VIE).
What kind of plane is on flight number OS66?
You’ll probably find yourself on a Boeing 777-200 if you’re on flight number OS66. Typically, this flight heads off from ORD and comes in to land at VIE.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your OS66 flight with Travelocity, please visit our Customer Service Portal.