App
Customer Support
USD
Find Bookings
Trip.com
>
Flights
>
Flights to United States
>
Flights to Sidney
>
Seattle to Sidney flight
>
Seattle to Sidney-Richland Municipal Airport flight
Worldwide Coverage
Worldwide Coverage
Flights to over 5,000 cities
One-stop Service Guarantee
One-stop Service Guarantee
Price guaranteed upon confirmed payment, booking guaranteed once tickets issued
Secure Payment
Secure Payment
Convenient & reliable booking and payment system

Cheap Flights from Seattle to Sidney-Richland Municipal Airport

  • One way
  • Round-trip
      • SEA07:55 pm
        12h 3m
        1 stop
        SDY08:58 am
        Seattle - Sidney|Tue, Jan 28|Alaska Airlines
        $169$182
        7% OFF
        7% OFF
        $182$169

        Choose Alaska Airlines flights from Seattle to Sidney. The one-way connecting flight with Alaska Airlines departs from Seattle-Tacoma International Airport on Tue, Jan 28, arriving at Sidney-Richland Municipal Airport. One-way Prices start from $169 including taxes and charges.

      • SEA01:00 pm
        3h 5m
        Nonstop
        SDY02:00 pm
        Seattle - Sidney|Fri, Jan 17|Alaska Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Selected Airlines from Seattle to Sidney-Richland Municipal Airport

United Airlines
From $164
Alaska Airlines
From $169
Delta Air Lines
From $170
American Airlines
From $380

Find more flights and airlines

There are 1 airport(s) in Seattle. Discover the top routes now!

  • 0.7 km from downtown Seattle
    Seattle-Tacoma International Airport
    Tickets From
    $164
Flight Schedule from Seattle to Sidney-Richland Municipal Airport
Flight info.
Departure
Arrival
Weekly Schedule

  1. UA2269

    United Airlines

    05:00 am

    SEA

    2.7h

    08:43 am

    DEN

    SMTWTFS
    Search

  2. UA703

    United Airlines

    11:45 am

    DEN

    1.6h

    01:18 pm

    BIL

    SMTWTFS

  3. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS

  4. DL1165

    Delta Air Lines

    05:05 pm

    SEA

    2.1h

    08:14 pm

    SLC

    SMTWTFS
    Search

  5. DL1724

    Delta Air Lines

    10:55 pm

    SLC

    1.4h

    12:16 am

    BIL

    SMTWTFS

  6. 9K1775

    Cape Air

    07:15 am

    BIL

    1.7h

    08:58 am

    SDY

    SMTWTFS

  7. DL1128

    Delta Air Lines

    05:30 am

    SEA

    2.0h

    08:33 am

    SLC

    SMTWTFS
    Search

  8. DL4038

    Delta Air Lines

    09:25 am

    SLC

    1.5h

    10:53 am

    BIL

    SMTWTFS

  9. 9K1781

    Cape Air

    12:05 pm

    BIL

    1.8h

    01:54 pm

    SDY

    SMTWTFS

  10. DL1239

    Delta Air Lines

    06:56 pm

    SEA

    1.9h

    09:53 pm

    SLC

    SMTWTFS
    Search

  11. DL1724

    Delta Air Lines

    10:55 pm

    SLC

    1.4h

    12:16 am

    BIL

    SMTWTFS

  12. 9K1775

    Cape Air

    07:15 am

    BIL

    1.7h

    08:58 am

    SDY

    SMTWTFS

  13. UA1829

    United Airlines

    08:20 am

    SEA

    2.7h

    12:04 pm

    DEN

    SMTWTFS
    Search

  14. UA5498

    United Airlines

    03:32 pm

    DEN

    1.7h

    05:14 pm

    BIL

    SMTWTFS

  15. 9K1785

    Cape Air

    05:56 pm

    BIL

    1.7h

    07:40 pm

    SDY

    SMTWTFS

  16. AS2367

    Alaska Airlines

    08:31 pm

    SEA

    1.8h

    11:19 pm

    BIL

    SMTWTFS
    Search

  17. 9K1775

    Cape Air

    07:15 am

    BIL

    1.7h

    08:58 am

    SDY

    SMTWTFS

  18. AS3492

    Alaska Airlines

    08:45 am

    SEA

    0.9h

    09:42 am

    PDX

    S--WT--
    Search

  19. AS2161

    Alaska Airlines

    10:53 am

    PDX

    1.8h

    01:38 pm

    BIL

    SMTWTFS

  20. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS

  21. AS2114

    Alaska Airlines

    08:55 am

    SEA

    0.9h

    09:49 am

    PDX

    SMTWTFS
    Search

  22. AS2161

    Alaska Airlines

    10:53 am

    PDX

    1.8h

    01:38 pm

    BIL

    SMTWTFS

  23. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS

  24. AS2360

    Alaska Airlines

    09:50 am

    SEA

    1.9h

    12:42 pm

    BIL

    SMTWTFS
    Search

  25. 9K1785

    Cape Air

    05:56 pm

    BIL

    1.7h

    07:40 pm

    SDY

    SMTWTFS

  26. AS2360

    Alaska Airlines

    09:50 am

    SEA

    1.9h

    12:42 pm

    BIL

    SMTWTFS
    Search

  27. 9K1789

    Cape Air

    03:00 pm

    BIL

    1.8h

    04:48 pm

    SDY

    SMTWTFS
Find more flights and airlines

Flight Info of Flights from Seattle to Sidney-Richland Municipal Airport

Cheapest nonstop flight price$169
Off-season for travelJanuary
Peak season for travelDecember

FAQs for Seattle to Sidney-Richland Municipal Airport Flights

  • When are flight tickets from Seattle (SEA) to Sidney (SDY) the cheapest?

    Airlines adjust prices for flights from Seattle to Sidney based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Seattle (SEA) to Sidney (SDY) cost?

    According to Trip.com's data, the lowest price is around $413.

Contact Us

About

Other Services

Payment Methods
Our Partners
Copyright © 2025 Trip.com Travel Singapore Pte. Ltd. All rights reserved
Site Operator: Trip.com Travel Singapore Pte. Ltd.