Delta Flight NH166 Deals & Information (2025/2026)

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Delta Flight 166 Route Deals From

The cheapest prices found with in the last 7 days for return flights were $899 and for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Aug 29 - Sun, Sep 14
HND
Haneda
SEA
Seattle - Tacoma Intl.
$899 Roundtrip, found 1 day ago
$899
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Aug 29 from Haneda to Seattle - Tacoma Intl., returning Sun, Sep 14, priced at $899 found 1 day ago
Fri, Sep 5 - Fri, Sep 19
HND
Haneda
SEA
Seattle - Tacoma Intl.
$907 Roundtrip, found 1 day ago
$907
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Sep 5 from Haneda to Seattle - Tacoma Intl., returning Fri, Sep 19, priced at $907 found 1 day ago
Tue, Sep 2 - Wed, Sep 17
HND
Haneda
SEA
Seattle - Tacoma Intl.
$1,015 Roundtrip, found 1 day ago
$1,015
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Sep 2 from Haneda to Seattle - Tacoma Intl., returning Wed, Sep 17, priced at $1,015 found 1 day ago
Tue, Sep 2 - Fri, Sep 19
HND
Haneda
SEA
Seattle - Tacoma Intl.
$1,022 Roundtrip, found 1 day ago
$1,022
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Sep 2 from Haneda to Seattle - Tacoma Intl., returning Fri, Sep 19, priced at $1,022 found 1 day ago
Tue, May 27 - Sun, Jun 1
HND
Haneda
SEA
Seattle - Tacoma Intl.
$1,034 Roundtrip, found 3 days ago
$1,034
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, May 27 from Haneda to Seattle - Tacoma Intl., returning Sun, Jun 1, priced at $1,034 found 3 days ago
Fri, Sep 5 - Sat, Sep 20
HND
Haneda
SEA
Seattle - Tacoma Intl.
$1,050 Roundtrip, found 1 day ago
$1,050
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Sep 5 from Haneda to Seattle - Tacoma Intl., returning Sat, Sep 20, priced at $1,050 found 1 day ago

Frequently asked questions

What route does flight number DL166 take?
Flight number DL166 operates direct from HND to Sea-Tac Airport. During this trip, expect to be in the air for 9 hours and 3 minutes. It pays to book ahead to lock in your favorite seat.
How often is DL166 on time?
Around 90% of DL166 flights arrive as scheduled — so if you’re jetting from Tokyo Airport (HND-Haneda) to SEA, you can kick back knowing that you’ll make it to your destination ASAP. If this Delta journey encounters a delay, you can expect to wait roughly 17 minutes. Thanks to the airline’s exceptional service, this route has a 4.1-star rating.
What terminal does DL166 fly out of?
You’ll likely be taking off from Terminal 3 if you’re booked on flight number DL166 direct from Haneda Airport (HND) to SEA.
What kind of plane is on flight number DL166?
The route for DL166 is predominantly Tokyo Haneda Airport to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.), and the Airbus A330-900neo is the aircraft model you’re likely to be flying with.
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 DL166 flight with Travelocity, please visit our Customer Service Portal.