Discover affordable flights from Ontario to SeaTac with prices starting from $216. Book your journey today!
Ontario
ONT
→
SeaTac
SEA
12/02/2025 – 12/09/2025
Cheap flight deals from Ontario to SeaTac
Average price start from:
i
$101
Round-trip flights from Ontario to SeaTac starting at $101. Book now for the best deals!
One-way from:
i
$57
One-way flights from Ontario to SeaTac starting at $57. Great for flexible travel!
Cheapest day:
i
Tuesday
Tuesday is the cheapest day to fly from Ontario to SeaTac. Save more by booking on this day!
Cheapest In:
i
$39
Jan 2025
Jan 2025 is the cheapest month to fly from Ontario to SeaTac with prices starting at $39.
Find flight deals from Ontario to SeaTac
Cheapest flights from Ontario to SeaTac
ONEWAY FLIGHTS
LAST MINUTE
CHEAP FLIGHTS
BEST FLIGHTS
Explore the cheapest oneway flights from Ontario to SeaTac spotted daily.
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
SEA
Unknown City
$57
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
PDX
Unknown City
$64
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
SEA
Unknown City
$87
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
PDX
Unknown City
$89
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
PDX
Unknown City
$98
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
SEA
Unknown City
$99
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
SEA
Unknown City
$104
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
PDX
Unknown City
$104
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
PDX
Unknown City
$109
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
GEG
Unknown City
$110
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
GEG
Unknown City
$111
Non-stop • 60 min
ONT
Ontario
ONT - Ontario • 2025-12-02 • 09:00
Unknown
60 min
SEA
Unknown City
$120
Non-stop • 60 min
Price Trends & Analysis
Weekly Price Trends
For the best deals, try flying to SeaTac on Tuesday.
Monthly Price Trends
Best time to book flights from Ontario to SeaTac is during January.
Weather & Climate Information
Temperature
SeaTac experiences a maritime climate with mild, wet winters (temperatures averaging 35-50°F) and cool, dry summers (averaging 55-80°F). The best times for comfortable travel are late spring to early fall, particularly May to September, when temperatures are warmer and rainfall is minimal.
Rainfall
The best time to visit SeaTac is from late spring to early fall, particularly June to September, when the weather is mild and pleasant. Additionally, consider timing your visit to coincide with local events like the Seattle International Film Festival in May or the Washington State Fair in September for a richer experience.
Airlines at Seattle
Discover excellent flight options from Ontario to SeaTac with top airlines including Frontier Airlines, Delta Air Lines, Alaska Airlines, United Airlines. These carriers offer reliable service and comfortable connections between these popular destinations.
The average flight time is approximately 10-15 hours, with most routes featuring one stopover for optimal pricing and convenience. When planning your journey from Ontario to SeaTac, these airlines provide excellent connectivity and modern aircraft for a pleasant travel experience.
Places to Visit in SeaTac
Nestled between the vibrant city of Seattle and the serene shores of Puget Sound, SeaTac is a hidden gem that boasts a unique blend of urban convenience and natural beauty. Visitors can explore the rich history of the region at the nearby Highline Historical Museum, while indulging in diverse culinary delights that reflect the area’s multicultural tapestry. With lush parks, stunning views of the Olympic Mountains, and easy access to world-class attractions, SeaTac invites travelers to experience the perfect balance of adventure and relaxation in the heart of the Pacific Northwest.
About SeaTac
Explore the wonders of SeaTac on your journey from Ontario. This remarkable destination blends cultural treasures with modern amenities, creating an enriching travel experience. Consider visiting during off-peak seasons for better value and fewer crowds.
Airlines Flying from Ontario to SeaTac
Discover excellent flight options from Ontario to SeaTac with top airlines including Frontier Airlines, Delta Air Lines, Alaska Airlines, United Airlines. These carriers offer reliable service and comfortable connections between these popular destinations.
The average flight time is approximately 10-15 hours, with most routes featuring one stopover for optimal pricing and convenience. When planning your journey from Ontario to SeaTac, these airlines provide excellent connectivity and modern aircraft for a pleasant travel experience.
Hotels in SeaTac
For accommodations near SeaTac Airport (SEA), consider booking hotels in the city center or near the airport. Many hotels offer shuttle services to and from the airport for convenient travel.
About SeaTac
Explore the wonders of SeaTac on your journey from Ontario. This remarkable destination blends cultural treasures with modern amenities, creating an enriching travel experience. Consider visiting during off-peak seasons for better value and fewer crowds.
Places to Visit in SeaTac
Nestled between the vibrant city of Seattle and the serene shores of Puget Sound, SeaTac is a hidden gem that boasts a unique blend of urban convenience and natural beauty. Visitors can explore the rich history of the region at the nearby Highline Historical Museum, while indulging in diverse culinary delights that reflect the area’s multicultural tapestry. With lush parks, stunning views of the Olympic Mountains, and easy access to world-class attractions, SeaTac invites travelers to experience the perfect balance of adventure and relaxation in the heart of the Pacific Northwest.
Hotels in SeaTac
For accommodations near SeaTac Airport (SEA), consider booking hotels in the city center or near the airport. Many hotels offer shuttle services to and from the airport for convenient travel.
Airlines Flying from Ontario to SeaTac
Discover excellent flight options from Ontario to SeaTac with top airlines including Frontier Airlines, Delta Air Lines, Alaska Airlines, United Airlines. These carriers offer reliable service and comfortable connections between these popular destinations.
The average flight time is approximately 10-15 hours, with most routes featuring one stopover for optimal pricing and convenience. When planning your journey from Ontario to SeaTac, these airlines provide excellent connectivity and modern aircraft for a pleasant travel experience.
Frequently Asked Questions
What is the cheapest flight from Ontario to SeaTac?
The cheapest fare is $57. For the best deals, consider booking during January and flying on Tuesday.
How long is the flight from Ontario to SeaTac?
Average flight time is around 10-15 hours, depending on layovers and the chosen route. Most flights include one stopover for optimal pricing.
Which airlines fly from Ontario to SeaTac?
Multiple airlines operate this route including Frontier Airlines, Delta Air Lines, Alaska Airlines. Check current schedules and availability for the best options.
What is the best time to book flights?
Booking 2–3 months in advance usually gives the best prices. Consider flying during January for additional savings.
Are there hotels near SEA Airport?
Yes, several hotels are conveniently located near SEA Airport, including options with shuttle services for easy airport access.
What should I know about SeaTac?
SeaTac offers a perfect blend of culture, history, and modern attractions. The best time to visit is during pleasant weather months for optimal experiences.
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