$278+ Cheap flights from Casper to Seattle (CPR - SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SEA
Oct 25 — Nov 11
Round-trip
1 adult, Economy
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Find cheap flights from Casper to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Casper to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from Casper to SeattleExplore the most affordable flight options available from Casper to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2026.
Explore the most affordable flight options available from Casper to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2026.
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/125:57 pm -
1 stop6h 18m
Sun 11/155:05 am -
1 stop4h 44m
Deal found 9/22![United Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:20 pm -
1 stop5h 17m
Sat 10/108:30 am -
1 stop7h 33m
Deal found 9/21![United Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:23 am -
1 stop5h 40m
Sat 11/78:30 am -
1 stop7h 47m
Deal found 9/21![United Airlines logo]()
$373
This United Airlines deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:00 pm -
1 stop5h 59m
Tue 10/135:00 am -
1 stop4h 48m
Deal found 9/23![United Airlines logo]()
$423
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:15 am -
1 stop7h 40m
Tue 11/38:30 am -
1 stop9h 23m
Deal found 9/22![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:11 pm -
1 stop8h 48m
Tue 10/135:00 am -
1 stop4h 48m
Deal found 9/22![United Airlines logo]()
$443
Best flights from Casper to SeattleDiscover carefully curated flight deals from Casper to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
Discover carefully curated flight deals from Casper to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:20 pm -
1 stop5h 17m
Sat 10/108:30 am -
1 stop7h 33m
Deal found 9/21![United Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/126:01 pm -
1 stop5h 58m
Sun 3/145:07 am -
1 stop4h 46m
Deal found 9/22![United Airlines logo]()
$376
This United Airlines deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:15 am -
1 stop5h 32m
Sun 11/155:05 am -
1 stop4h 44m
Deal found 9/24![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:15 am -
1 stop7h 40m
Tue 11/38:30 am -
1 stop9h 23m
Deal found 9/23![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/213:18 pm -
1 stop8h 58m
Wed 12/305:00 am -
1 stop4h 58m
Deal found 9/25![United Airlines logo]()
$428
Last-minute flights from Casper to SeattleDiscover last-minute flight deals from Casper to Seattle. Data last updated September 25, 2026 and is based on user searches.
Discover last-minute flight deals from Casper to Seattle. Data last updated September 25, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:23 am -
1 stop5h 40m
Sat 11/78:30 am -
1 stop7h 47m
Deal found 9/21![United Airlines logo]()
$373
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:20 pm -
1 stop5h 17m
Sat 10/108:30 am -
1 stop7h 33m
Deal found 9/21![United Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:11 pm -
1 stop8h 48m
Tue 10/135:00 am -
1 stop4h 48m
Deal found 9/22![United Airlines logo]()
$443
This United Airlines deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:06 am -
2 stops12h 53m
Tue 10/135:00 am -
1 stop6h 39m
Deal found 9/23![United Airlines logo]()
$464
This United Airlines deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:00 pm -
1 stop5h 59m
Tue 10/135:00 am -
1 stop4h 48m
Deal found 9/23![United Airlines logo]()
$423
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:15 am -
1 stop7h 40m
Tue 11/38:30 am -
1 stop9h 23m
Deal found 9/22![United Airlines logo]()
$428
One-way flights from Casper to SeattleSearch for one-way flight options from Casper to Seattle. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
Search for one-way flight options from Casper to Seattle. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:15 am -
1 stop5h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$278
Find flight deals from Casper to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Casper (CPR) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $328 (United Airlines) |
One-way from | $278 (United Airlines) |
Popular in | December |
Cheapest in | February |
Average price | $645 |
Cheapflights Fare Finder
Customize your flight search to find flights from Casper to Seattle 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, Cheapflights users made 7,457,451 searches. Data last updated September 25, 2026.
Use the filters below to find and compare flights from Casper to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
CasperSeattle
CPR Casper Natrona County - SEA Seattle/Tacoma Intl
CPRSEA
Casper Natrona County
Fri 10/23
5:15 am-10:01 am
1 stop5h 46m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$278
CasperSeattle
CPR Casper Natrona County - SEA Seattle/Tacoma Intl
CPRSEA
Casper Natrona County
Tue 10/6
1:20 pm-5:37 pm
1 stop5h 17m
Seattle/Tacoma Intl
Sat 10/10
8:30 am-5:03 pm
1 stop7h 33m
$358
CasperSeattle
CPR Casper Natrona County - SEA Seattle/Tacoma Intl
CPRSEA
Casper Natrona County
Fri 3/12
6:01 pm-10:59 pm
1 stop5h 58m
Seattle/Tacoma Intl
Sun 3/14
5:07 am-10:53 am
1 stop4h 46m
$376
CasperSeattle
CPR Casper Natrona County - SEA Seattle/Tacoma Intl
CPRSEA
Casper Natrona County
Sat 11/7
5:15 am-9:47 am
1 stop5h 32m
Seattle/Tacoma Intl
Sun 11/15
5:05 am-10:49 am
1 stop4h 44m
$428
CasperSeattle
CPR Casper Natrona County - SEA Seattle/Tacoma Intl
CPRSEA
Casper Natrona County
Sat 10/31
7:15 am-1:55 pm
1 stop7h 40m
Seattle/Tacoma Intl
Tue 11/3
8:30 am-6:53 pm
1 stop9h 23m
$428
CasperSeattle
CPR Casper Natrona County - SEA Seattle/Tacoma Intl
CPRSEA
Casper Natrona County
Mon 12/21
3:18 pm-11:16 pm
1 stop8h 58m
Seattle/Tacoma Intl
Wed 12/30
5:00 am-10:58 am
1 stop4h 58m
$428
Sorted by cheapest first
Compare providers for flights from Casper to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Casper to Seattle in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Casper-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Casper-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Casper-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Casper-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Casper-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Casper to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Casper with our price prediction graph.
CPR-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated September 25, 2026.
See what other customers who have flown with United Airlines from Casper to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.7
Comfort
7.3
Overall
7.4
Food
6.7
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Boarding
7.7
Comfort
7.3
Overall
7.4
Food
6.7
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Related info for your journey
Find useful and relevant information for your journey from Casper to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
Poulsbo
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Casper and Seattle flights
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Other flights from Casper
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Top airline flying from Casper to Seattle
Discover the top airline that operate flights from Casper to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$285 | Average$457 | FlexibilityNo cancel fee | On-time69% |