$139+ Cheap flights from Helena to Seattle (HLN - SEA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SEA
Sep 9 — Sep 161
Round-trip
1 adult, Economy
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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
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Cheapest flights from Helena to SeattleExplore the most affordable flight options available from Helena to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
Explore the most affordable flight options available from Helena to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:41 pm -
Nonstop1h 52m
Tue 11/101:28 pm -
Nonstop1h 36m
Deal found 8/6![Alaska Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:08 pm -
1 stop4h 47m
Wed 10/215:25 am -
1 stop6h 03m
Deal found 8/9![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:57 pm -
1 stop6h 39m
Sun 10/45:45 am -
1 stop5h 32m
Deal found 8/6![Delta logo]()
$247
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/171:08 pm -
1 stop6h 54m
Wed 10/215:25 am -
1 stop6h 03m
Deal found 8/9![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:08 pm -
1 stop6h 44m
Tue 10/205:25 am -
1 stop6h 03m
Deal found 8/9![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:26 pm -
Nonstop1h 52m
Thu 10/222:14 pm -
Nonstop1h 35m
Deal found 8/9![Alaska Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:26 pm -
Nonstop1h 52m
Tue 10/202:14 pm -
Nonstop1h 35m
Deal found 8/9![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:55 pm -
1 stop6h 49m
Sat 9/55:30 am -
1 stop5h 45m
Deal found 8/6![Delta logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:18 pm -
Nonstop1h 56m
Sat 9/122:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$302
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:08 pm -
1 stop4h 47m
Mon 10/265:25 am -
1 stop6h 03m
Deal found 8/9![Delta logo]()
$308
This Delta deal was found by Cheapflights users on 8/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:57 pm -
1 stop6h 55m
Mon 9/145:45 am -
1 stop5h 32m
Deal found 8/5![Delta logo]()
$328
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/115:26 pm -
Nonstop1h 52m
Wed 10/212:14 pm -
Nonstop1h 35m
Deal found 8/9![Alaska Airlines logo]()
$337
Best flights from Helena to SeattleDiscover carefully curated flight deals from Helena to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
Discover carefully curated flight deals from Helena to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:55 pm -
1 stop6h 49m
Sat 9/55:30 am -
1 stop5h 45m
Deal found 8/6![Delta logo]()
$292
This Priceline deal was found by Cheapflights users on 8/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:26 pm -
Nonstop1h 52m
Mon 10/52:14 pm -
Nonstop1h 35m
Deal found 8/10![Alaska Airlines logo]()
$302
This United Airlines deal was found by Cheapflights users on 8/8. 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 11/72:23 pm -
1 stop7h 56m
Tue 11/105:05 am -
1 stop7h 35m
Deal found 8/8![United Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:08 pm -
1 stop4h 47m
Mon 10/265:25 am -
1 stop6h 03m
Deal found 8/9![Delta logo]()
$308
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:08 pm -
1 stop6h 54m
Fri 10/305:25 am -
1 stop6h 03m
Deal found 8/6![Delta logo]()
$328
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:18 pm -
Nonstop1h 56m
Sat 9/262:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:08 pm -
1 stop4h 47m
Thu 10/295:25 am -
1 stop6h 03m
Deal found 8/6![Delta logo]()
$328
This United Airlines deal was found by Cheapflights users on 8/7. 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 1/62:30 pm -
1 stop7h 42m
Tue 1/125:07 am -
1 stop7h 20m
Deal found 8/7![United Airlines logo]()
$474
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:57 pm -
1 stop6h 39m
Sat 9/265:45 am -
1 stop5h 32m
Deal found 8/6![Delta logo]()
$358
This United Airlines deal was found by Cheapflights users on 8/10. 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 9/106:15 am -
1 stop6h 42m
Wed 9/162:34 pm -
1 stop5h 56m
Deal found 8/10![United Airlines logo]()
$507
This Delta deal was found by Cheapflights users on 8/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:08 pm -
1 stop6h 44m
Mon 10/125:25 am -
1 stop6h 03m
Deal found 8/7![Delta logo]()
$393
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:57 pm -
1 stop4h 53m
Wed 9/165:45 am -
1 stop5h 32m
Deal found 8/8![Delta logo]()
$433
Last-minute flights from Helena to SeattleDiscover last-minute flight deals from Helena to Seattle. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Helena to Seattle. Data last updated August 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:55 pm -
1 stop6h 49m
Sat 9/55:30 am -
1 stop5h 45m
Deal found 8/6![Delta logo]()
$292
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:11 pm -
Nonstop1h 57m
Tue 9/82:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:11 pm -
Nonstop1h 57m
Fri 9/252:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:18 pm -
Nonstop1h 56m
Sat 9/262:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:18 pm -
Nonstop1h 56m
Sat 9/262:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:18 pm -
Nonstop1h 56m
Sat 9/122:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$302
This Booking.com deal was found by Cheapflights users on 8/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:18 pm -
Nonstop1h 56m
Wed 9/162:05 pm -
Nonstop1h 36m
Deal found 8/8![Alaska Airlines logo]()
$350
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:57 pm -
1 stop6h 55m
Sat 9/265:45 am -
1 stop5h 32m
Deal found 8/8![Delta logo]()
$328
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/122:26 pm -
1 stop8h 05m
Wed 9/235:00 am -
1 stop7h 45m
Deal found 8/8![United Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:57 pm -
1 stop6h 55m
Fri 9/255:45 am -
1 stop15h 39m
Deal found 8/8![Delta logo]()
$376
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:57 pm -
1 stop6h 39m
Sat 9/265:45 am -
1 stop5h 32m
Deal found 8/6![Delta logo]()
$358
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:18 pm -
Nonstop1h 56m
Sat 9/262:05 pm -
Nonstop1h 36m
Deal found 8/6![Alaska Airlines logo]()
$377
One-way flights from Helena to SeattleSearch for one-way flight options from Helena to Seattle. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
Search for one-way flight options from Helena to Seattle. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Priceline deal was found by Cheapflights users on 8/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:18 pm -
Nonstop1h 56m
Deal found 8/10![Alaska Airlines logo]()
$139
This Delta deal was found by Cheapflights users on 8/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:57 pm -
1 stop4h 53m
Deal found 8/7![Delta logo]()
$144
This Priceline deal was found by Cheapflights users on 8/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:26 pm -
Nonstop1h 52m
Deal found 8/6![Alaska Airlines logo]()
$149
This Delta deal was found by Cheapflights users on 8/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:08 pm -
1 stop6h 44m
Deal found 8/6![Delta logo]()
$154
This Expedia deal was found by Cheapflights users on 8/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:18 pm -
Nonstop1h 56m
Deal found 8/6![Alaska Airlines logo]()
$155
This United Airlines deal was found by Cheapflights users on 8/7. 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 10/282:23 pm -
1 stop7h 56m
Deal found 8/7![United Airlines logo]()
$179
This Delta deal was found by Cheapflights users on 8/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:57 pm -
1 stop4h 53m
Deal found 8/7![Delta logo]()
$185
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Sun 8/306:15 am -
1 stop6h 29m
Deal found 8/7![United Airlines logo]()
$195
This Expedia deal was found by Cheapflights users on 8/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:18 pm -
Nonstop1h 56m
Deal found 8/9![Alaska Airlines logo]()
$197
This Priceline deal was found by Cheapflights users on 8/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:11 pm -
Nonstop1h 57m
Deal found 8/6![Alaska Airlines logo]()
$199
This United Airlines deal was found by Cheapflights users on 8/6. 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 8/282:35 pm -
2 stops9h 51m
Deal found 8/6![United Airlines logo]()
$200
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:55 pm -
1 stop4h 59m
Deal found 8/10![Delta logo]()
$209
Find flight deals from Helena to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) 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 August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $217 (Alaska Airlines) |
One-way from | $139 (Priceline) |
Popular in | June |
Cheapest in | February |
Average price | $257 |
Good round-trip deal | $257 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Helena 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 2,558,603 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from Helena to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Tue 9/1
12:55 pm-6:44 pm
1 stop6h 49m
Seattle/Tacoma Intl
Sat 9/5
5:30 am-12:15 pm
1 stop5h 45m
$292
Quickest round-trip
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Sat 10/3
5:26 pm-6:18 pm
Nonstop1h 52m
Seattle/Tacoma Intl
Mon 10/5
2:14 pm-4:49 pm
Nonstop1h 35m
$302
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Thu 10/22
1:08 pm-4:55 pm
1 stop4h 47m
Seattle/Tacoma Intl
Mon 10/26
5:25 am-12:28 pm
1 stop6h 03m
$308
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Tue 10/27
1:08 pm-7:02 pm
1 stop6h 54m
Seattle/Tacoma Intl
Fri 10/30
5:25 am-12:28 pm
1 stop6h 03m
$328
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Tue 10/27
1:08 pm-4:55 pm
1 stop4h 47m
Seattle/Tacoma Intl
Thu 10/29
5:25 am-12:28 pm
1 stop6h 03m
$328
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Sat 11/7
2:23 pm-9:19 pm
1 stop7h 56m
Seattle/Tacoma Intl
Tue 11/10
5:05 am-1:40 pm
1 stop7h 35m
$343
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Wed 9/23
12:57 pm-6:36 pm
1 stop6h 39m
Seattle/Tacoma Intl
Sat 9/26
5:45 am-12:17 pm
1 stop5h 32m
$358
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Wed 9/23
5:18 pm-6:14 pm
Nonstop1h 56m
Seattle/Tacoma Intl
Sat 9/26
2:05 pm-4:41 pm
Nonstop1h 36m
$377
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Fri 10/9
1:08 pm-6:52 pm
1 stop6h 44m
Seattle/Tacoma Intl
Mon 10/12
5:25 am-12:28 pm
1 stop6h 03m
$393
HelenaSeattle
HLN Helena - SEA Seattle/Tacoma Intl
HLNSEA
Helena
Thu 9/10
12:57 pm-4:50 pm
1 stop4h 53m
Seattle/Tacoma Intl
Wed 9/16
5:45 am-12:17 pm
1 stop5h 32m
$433
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Helena 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 Helena to Seattle in August.
| 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 Helena-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Helena-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 Helena-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 Helena to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Helena with our price prediction graph.
HLN-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.
Cheapflights Insights
Everything you need to know about your flight from Helena to Seattle
What is the cheapest month to book a flight from Helena to Seattle?
Currently, February is the cheapest month in which you can book a flight from Helena to Seattle (average of $147). Flying from Helena to Seattle in June is currently the most expensive (average of $438). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from HLN to SEA?
Find hourly flight availability from Helena to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 10, 2026.
A simple way to save on the total cost of your ticket is to fly from Helena to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 58% on your trip compared to booking a flight at noon.
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 August 10, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines from Helena to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Related info for your journey
Find useful and relevant information for your journey from Helena 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
Edmonds
Snoqualmie
Lynnwood
Tumwater
Centralia
Puyallup
Marysville
Kent
Ellensburg
Fife
Ocean Shores
Lakewood
Poulsbo
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Top airline flying from Helena to Seattle
Discover the top airline that operate flights from Helena 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 2,558,603 searches. Data last updated August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$213 | FlexibilityNo cancel fee | On-time75% |