Best Flights starting from $160
from$160economy
Ontario (ONT)
Sat, Apr 18
Roundtrip
Seattle (SEA)
Wed, Apr 22
from$160economy
Ontario (ONT)
Mon, Apr 20
Roundtrip
Seattle (SEA)
Fri, Apr 24
from$160economy
Ontario (ONT)
Tue, Apr 21
Roundtrip
Seattle (SEA)
Sat, Apr 25
from$160economy
Ontario (ONT)
Wed, Apr 22
Roundtrip
Seattle (SEA)
Sun, Apr 26
from$160economy
Ontario (ONT)
Thu, Apr 23
Roundtrip
Seattle (SEA)
Mon, Apr 27
from$160economy
Ontario (ONT)
Fri, Apr 24
Roundtrip
Seattle (SEA)
Tue, Apr 28
from$181economy
Ontario (ONT)
Sun, Apr 19
Roundtrip
Seattle (SEA)
Thu, Apr 23
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Other Options for This Route
Other Destinations
Ontario (ONT) to Las Vegas (Any) in April from $33
From $33
Ontario (ONT) to Denver (DEN) in April from $69
From $69
Ontario (ONT) to Portland (PDX) in April from $89
From $89
Ontario (ONT) to San Francisco (SFO) in April from $90
From $90
Ontario (ONT) to Portland (PDX) in April from $147
From $147
Ontario (ONT) to Atlanta (ATL) in April from $160
From $160
Flights from Other Cities
Las Vegas (LAS) to Seattle (SEA) in April from $28
From $28
Los Angeles (LAX) to Seattle (SEA) in April from $56
From $56
Dallas (DFW) to Seattle (SEA) in April from $80
From $80
Phoenix (Any) to Seattle (SEA) in April from $113
From $113
San Antonio (SAT) to Seattle (SEA) in April from $125
From $125
New York (JFK) to Seattle (SEA) in April from $138
From $138
✈️ Flight Guide: Ontario (ONT) → Seattle (SEA)
Complete travel information for your April journey
Departing from Ontario (ONT) FAQs
To find the cheapest economy flights from Seattle-Tacoma International Airport (SEA) in May, search flexible dates within a 7–14 day range and sign up for fare alerts from low-cost carriers and OTAs. May is shoulder season for many U.S. routes, so compare weekday departures and connecting options and book 2–8 weeks in advance for optimal savings. Use targeted queries like "cheap flights Seattle May" to surface discounted economy fares and set price alerts to lock in the best deal.
Seattle-Tacoma International Airport (SEA) serves the Puget Sound region and provides easy access to Seattle, Tacoma, Bellevue, and Everett, plus international connections to Vancouver, B.C., and Portland. Travelers often use SEA to reach nearby destinations like Spokane and the San Juan Islands via regional connections. Use SEA as your gateway for both West Coast city breaks and international travel when searching for cheap flights.
Low-cost carriers operating out of Seattle-Tacoma International Airport (SEA) frequently include Alaska Airlines, Southwest Airlines, and Spirit Airlines on select routes—each offering competitive economy fares when booked early or during sales. For the absolute cheapest fares, compare these carriers alongside meta-search engines and consider basic economy restrictions. Sign up for airline newsletters and follow flash sales to catch deeply discounted routes from SEA.
For economy travelers at Seattle-Tacoma International Airport (SEA), arrive 90–120 minutes before domestic departures and 2.5–3 hours before international flights to allow time for check-in and security. Use online check-in and TSA PreCheck if available to reduce wait times, and pack carry-on items according to airline economy rules to avoid gate-check fees. Check SEA's real-time security wait times before traveling for the best planning.
Yes—seasonal deals from Seattle-Tacoma International Airport (SEA) often appear for destinations such as Los Angeles, Las Vegas, Phoenix, Denver, and Cancun, especially during shoulder seasons and holiday sales. Track fare calendars and set price alerts for SEA to these cities to capture seasonal discounts and economy class promotions. Book quickly when a sale appears because the cheapest economy seats sell out fast.
Budget travelers can reach Seattle-Tacoma International Airport (SEA) via Link light rail, express buses, rideshare, and economy parking options that reduce overall trip cost. The Link light rail connects downtown Seattle to SEA with affordable fares, while long-term economy parking and off-airport shuttles are good options for cost-conscious travelers. Consider pre-booking airport parking and using public transit to keep your total travel expense low.
Arriving at Seattle (SEA) FAQs
Cheapest Economy (ECO) refers to the lowest available economy fare class, typically with more restrictions like no seat selection and limited or no checked baggage included. When booking from Seattle-Tacoma International Airport (SEA), compare ECO fares across carriers and watch for ancillary fees that can increase the total cost. Use search filters for fare type and check the fine print before selecting the cheapest economy option.
Popular destinations with frequently cheap economy arrivals from Seattle-Tacoma International Airport (SEA) include Los Angeles, Las Vegas, Phoenix, Denver, and Vancouver. Internationally, budget-friendly economy fares sometimes appear to Cancun, Mexico City, and London during sale periods. Use fare calendars and flexible-date searches to identify the cheapest arrival cities for economy travel from SEA.
To maximize savings on cheapest economy arrivals in December, book early for holiday travel or target travel just before or after peak holiday windows for the best rates. Set fare alerts for Seattle-Tacoma International Airport (SEA) to your desired arrival city and be flexible with midweek or red-eye flights to lower costs. Also compare connecting itineraries and light-checked baggage options to keep the total trip price down.
Yes—connecting flights frequently provide the cheapest economy arrivals because they allow carriers to offer lower fares on less popular routing or combine legs from different markets. When searching from Seattle-Tacoma International Airport (SEA), weigh the savings against added travel time and potential connection risk. If your priority is lowest price, include 1–2 stop options in fare searches.
If your destination is flexible, consider flying into nearby major cities like Los Angeles, San Francisco, Las Vegas, Denver, or Vancouver and then using a budget regional flight or ground transport to reach your final stop. These hubs often have intense competition that drives down cheapest economy fares from Seattle-Tacoma International Airport (SEA). Factor in transfer costs and travel time when comparing overall value.
Typically, cheapest economy arrivals do not include complimentary checked baggage or advanced seat selection; these are usually add-ons for basic economy tickets. When booking from Seattle-Tacoma International Airport (SEA), review the fare rules and add ancillary services only if needed to avoid surprise fees. Consider slightly higher economy tiers if you need baggage or seat guarantees.
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Events and Festivals — How They Affect Economy Fares from Seattle-Tacoma International Airport (SEA)
Major events—music festivals, sports tournaments, and conventions—drive demand and raise economy fares departing Seattle-Tacoma International Airport (SEA). Examples: Seattle Seafair (summer) and holiday conventions can push prices up; conversely, mid-September after Labor Day often sees rates drop. When planning, check event calendars for your arrival city and either book well in advance or choose alternative dates to secure cheap economy fares.
Best Time to Fly from Seattle-Tacoma International Airport (SEA) for Cheapest Economy Fares
The best time to fly from Seattle-Tacoma International Airport (SEA) for cheap economy fares is during shoulder seasons (April–May, September–October), midweek days (Tuesday–Thursday), and off-peak hours (red-eyes and early-morning). Booking window recommendations: 1–3 months for domestic economy and 2–6 months for popular international routes to capture sale pricing. Use LSI phrases such as 'low season travel', 'shoulder season deals', and 'weekday fare discounts' when searching.
Direct vs Connecting Flights — Finding Cheapest Economy Routes from SEA
Connecting flights often deliver the cheapest economy fares out of Seattle-Tacoma International Airport (SEA) by leveraging lower demand legs, while direct flights save time and reduce connection risk. For budget travelers, include 1–2 stop options in your search and weigh savings against longer travel time. If time is a priority, filter for nonstop flights, but if price is primary, explore multi-leg itineraries and alternate hubs.
Airline Comparison — Best Carriers for Cheap Economy Flights from SEA
Major carriers out of Seattle-Tacoma International Airport (SEA) include Alaska Airlines, Delta, United, and Southwest, with Spirit and other low-cost options on select routes. Alaska often offers strong West Coast coverage and competitive fares, while Southwest provides flexible change policies that can offset slightly higher base fares. Carefully compare basic economy rules, baggage fees, and schedule convenience when choosing the cheapest economy carrier for your route.
Seasonal Travel Tips — Find Cheap Economy Flights from SEA Year-Round
Spring and fall shoulder seasons are the best times to find cheap economy flights from Seattle-Tacoma International Airport (SEA). In winter, target sunny-destination deals and January sales; in summer, book early or travel outside peak holiday weeks. Use season-specific keywords like 'spring shoulder season deals', 'winter sale flights', and 'summer peak fares' when searching, and combine fare alerts with flexible-date tools for best results. CTA: Apply these seasonal tips and search cheap flights from Seattle-Tacoma International Airport (SEA) today to lock in the lowest economy fares.
Flight Time and Schedules — From Seattle-Tacoma International Airport (SEA) to Popular Hubs
Flight times from Seattle-Tacoma International Airport (SEA) vary by destination: West Coast hops like Portland and Vancouver are 30–90 minutes, Los Angeles is ~2.5–3 hours, Denver about 2.5 hours, and transcontinental U.S. flights average 4–6 hours. For the cheapest economy fares, consider red-eye or early-morning departures when schedules are less congested and fares can be lower. Use carrier timetables and fare calendars to align preferred schedules with the best economy prices.
Cheap Flights — How to Find the Lowest Economy Fares from Seattle-Tacoma International Airport (SEA)
Finding cheap economy flights from Seattle-Tacoma International Airport (SEA) requires using flexible-date searches, subscribing to fare alerts, and comparing legacy and low-cost carriers. Search early for peak months and look for shoulder-season and midweek departures to reduce costs. Use LSI keywords like 'discount flights', 'budget airfare', and 'fare calendar' when optimizing search queries. Call-to-action: Compare cheap flights from Seattle-Tacoma International Airport (SEA) now and sign up for price alerts to snag the best deals.