Other Options for This Route
Seattle (SEA) to San Francisco (SFO) in May from $49
From $49
Seattle (SEA) to San Francisco (SFO) in March from $135
From $135
Seattle (SEA) to San Francisco (SFO) in April from $148
From $148
Best Flights starting from $97
from$97economy
Seattle (SEA)
Tue, May 12
Roundtrip
San Francisco (SFO)
Fri, May 15
from$97economy
Seattle (SEA)
Wed, May 13
Roundtrip
San Francisco (SFO)
Sat, May 16
from$97economy
Seattle (SEA)
Sat, May 16
Roundtrip
San Francisco (SFO)
Tue, May 19
from$97economy
Seattle (SEA)
Sun, May 17
Roundtrip
San Francisco (SFO)
Wed, May 20
from$108economy
Seattle (SEA)
Fri, May 15
Roundtrip
San Francisco (SFO)
Mon, May 18
from$135economy
Seattle (SEA)
Thu, May 14
Roundtrip
San Francisco (SFO)
Sun, May 17
from$158economy
Seattle (SEA)
Mon, May 18
Roundtrip
San Francisco (SFO)
Thu, May 21
Fields updated — click View Prices to search ↑
Other Options for This Route
Other Destinations
Seattle (SEA) to Las Vegas (LAS) in May from $87
From $87
Seattle (SEA) to Phoenix (PHX) in May from $97
From $97
Seattle (SEA) to Los Angeles (LAX) in May from $117
From $117
Seattle (SEA) to Santa Ana (SNA) in May from $117
From $117
Seattle (SEA) to San Diego (Any) in May from $127
From $127
Seattle (SEA) to Orlando (MCO) in May from $166
From $166
Flights from Other Cities
Chicago (ORD) to San Francisco (SFO) in May from $125
From $125
Grand Rapids (GRR) to San Francisco (SFO) in May from $194
From $194
Salt Lake City (SLC) to San Francisco (SFO) in May from $198
From $198
Fort Lauderdale (Any) to San Francisco (SFO) in May from $199
From $199
Washington, D.C. (DCA) to San Francisco (SFO) in May from $217
From $217
Pittsburgh (PIT) to San Francisco (SFO) in May from $254
From $254
✈️ Flight Guide: Seattle (SEA) → San Francisco (SFO)
Complete travel information for your May journey
Departing from Seattle (SEA) FAQs
To find the cheapest economy flights from San Francisco International Airport (SFO), compare prices across aggregators like Google Flights and Skyscanner, set price alerts, and search flexible dates using month view. Book 6–10 weeks in advance for domestic routes and 2–4 months for international economy fares, and consider midweek departures to lower costs. Use keywords like "cheap flights SFO," "low cost economy San Francisco," and "SFO fare sales" when searching to surface targeted deals. Book now or sign up for fare alerts to catch flash sales from major carriers and low-cost airlines.
San Francisco International Airport (SFO) is served by BART (Bay Area Rapid Transit), SamTrans buses, rideshares, taxis, and multiple shuttle services; BART connects SFO directly to downtown San Francisco and Oakland. Expect 30–45 minutes to downtown San Francisco by BART or 20–60 minutes by car depending on traffic. For cheapest transfers search "SFO public transit" or "BART to SFO" and consider shared airport shuttles for lower-cost options.
In October, security lines at San Francisco International Airport (SFO) are often shortest midweek (Tuesday–Thursday) and early morning between 5:00–7:30 a.m. or late evening after 9:30 p.m., especially outside major holiday windows. Use the TSA PreCheck lane if eligible to reduce screening time significantly; check live wait times on the SFO website or airport apps before leaving. Planning flights outside peak commuter and holiday periods helps you avoid long lines.
San Francisco International Airport (SFO) commonly serves nearby major cities like Oakland, San Jose, Sacramento, Monterey, and Napa, and is a primary gateway for connections to Los Angeles, Las Vegas, New York, London, and Tokyo. Many travelers use SFO to access the broader Bay Area and Northern California wine country, as well as international hubs on the west coast. When searching for cheap flights, include location modifiers like "SFO to Los Angeles cheap flights" or "San Francisco to London economy deals" for targeted results.
December can offer both bargains and higher fares from San Francisco International Airport (SFO): earlier in December you may find discounted economy seats on midweek flights, while holiday week (Dec 20–31) prices spike. For December travel, book as early as possible, monitor fare calendars for December midweek openings, and consider flying on December 24 or 26 for lower economy fares. Sign up for airline newsletters and set alerts labeled "SFO December deals" to capture limited-time discounts.
For economy travel departing San Francisco International Airport (SFO), make sure to have a valid government ID for domestic flights and a passport with any required visas for international routes; check airline-specific carry-on and checked baggage allowances as they vary by carrier and fare class. Low-cost carriers often charge additional fees for checked bags and seat selection—look for "basic economy SFO baggage" terms when booking. Arrive at least 2 hours for domestic and 3 hours for international departures to allow time for check-in and security.
Arriving at San Francisco (SFO) FAQs
"Cheapest Economy (ECN)" refers to the lowest available economy fare class, often with restrictions like non-refundable tickets, limited or no seat selection, and baggage fees. When booking from San Francisco International Airport (SFO), read fare rules for ECN carefully—these fares often require online check-in and may be limited to carry-on only. If you need flexibility, search for upgraded economy or standard economy fare classes and compare total trip cost, including baggage and seat fees.
Travelers flying cheapest economy into major hubs from San Francisco International Airport (SFO) often target cities like Los Angeles, New York City, Las Vegas, Seattle, London, and Tokyo. These popular routes frequently have competitive low-cost and basic economy options due to high frequency and carrier competition. When searching, use modifiers like "SFO to NYC cheap economy" or "San Francisco to London economy deals" to find the lowest fares.
In November, especially around Thanksgiving, cheapest economy fares into busy hubs can be more expensive due to holiday demand; aim for early-November midweek arrivals to find lower fares. If your travel is flexible, arriving the Tuesday or Wednesday before Thanksgiving or scheduling a return the Monday after can reduce costs. Always check aggregate fare calendars for November to compare cheapest arrival dates and enable alerts with keywords like "SFO November cheap arrival".
For international cheapest economy arrivals originating at San Francisco International Airport (SFO), passengers must complete required customs and immigration forms, present valid passports and visas, and follow CBP (U.S. Customs and Border Protection) procedures upon arrival. Even in cheapest economy, you will undergo the same security and immigration checks as other passengers; allow extra time for processing during peak hours. Consult the airport and airline websites for specific arrival terminal information and passport control hours.
Changing or upgrading a cheapest economy (ECN) ticket booked for travel from San Francisco International Airport (SFO) depends on the airline's fare rules; many basic economy fares are non-changeable and may require paying a higher fare to upgrade. Contact the airline as soon as possible for upgrade options, or look for paid upgrades at online check-in or at the gate. Compare the cost of buying a higher fare class at booking with the likely upgrade fee to decide the most economical choice.
Cheapest economy passengers arriving into San Francisco International Airport (SFO) commonly continue to nearby cities such as Oakland, San Jose, Sacramento, Napa Valley, Monterey, and the greater Bay Area. Ground options include BART, regional buses, shuttles, and rideshares; for budget onward travel, consider public transit or scheduled airport shuttles. Use search terms like "SFO to Napa shuttle" or "BART from SFO" to find affordable transfers.
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Events & Festivals Impacting Flight Prices — San Francisco International Airport (SFO) Calendar
High-profile events around San Francisco—such as Outside Lands (August), Fleet Week (October), Pride (June), and major tech conferences—significantly increase demand and raise economy fares at San Francisco International Airport (SFO). Plan travel around these event dates to avoid price spikes or book well in advance if attending. For cheapest economy travel, target off-event dates and consider nearby airports like Oakland (OAK) or San Jose (SJC) for lower fares. CTA: Check San Francisco event dates and compare cheapest economy flights into San Francisco International Airport (SFO) and nearby airports.
Best Time to Fly — When to Book Cheap Economy from San Francisco International Airport (SFO)
The best time to fly for cheap economy fares from San Francisco International Airport (SFO) is during shoulder seasons (September–October and January–February) and midweek travel days (Tues–Thurs). Book domestic economy flights 6–10 weeks in advance and international economy roughly 2–4 months prior to departure for the most consistent savings. Use fare calendars and set alerts to spot temporary promotions, and be flexible with airports and times to maximize economy savings. CTA: Check fare calendars for San Francisco International Airport (SFO) and start monitoring prices today to find the cheapest economy seats.
Direct vs. Connecting Flights — Cheapest Economy Decisions from San Francisco International Airport (SFO)
Direct (nonstop) flights from San Francisco International Airport (SFO) are more convenient but often pricier in economy, while connecting itineraries can significantly lower the fare at the cost of longer travel time. For cheapest economy options, compare total door-to-door time and potential overnight layovers; multi-carrier connections sometimes produce the best value. Use filters to compare nonstop vs connecting prices and weigh savings against added travel time and layover risk. CTA: Compare direct and connecting cheapest economy flights from San Francisco International Airport (SFO) to determine the best balance of price and convenience.
Airline Comparison — Cheapest Economy Options from San Francisco International Airport (SFO)
Major carriers that frequently offer competitively priced economy seats from San Francisco International Airport (SFO) include United Airlines, Alaska Airlines, Delta Air Lines, American Airlines, and low-cost competitors like Southwest, Spirit, and Frontier. United and Alaska provide extensive route networks and often competitive transcontinental and Pacific fares, while Spirit and Frontier can offer ultra-low base fares with additional baggage fees—evaluate the total trip cost including baggage and seat fees. Compare economy fare classes (basic economy, standard economy, premium economy) and read fare rules before booking. CTA: Compare airlines departing San Francisco International Airport (SFO) to find the cheapest economy option for your trip.
Seasonal Travel Tips for Cheapest Economy Flights from San Francisco International Airport (SFO)
Seasonal tips for cheapest economy travel from San Francisco International Airport (SFO): in winter and holiday months, book early and consider midweek travel; in shoulder seasons (September–November, January–March) use flexible dates for the best savings; in summer, reserve seats months ahead or fly midweek to avoid peak rates. Pack light to avoid checked baggage fees on basic economy fares and bring a compact travel adapter, layers for San Francisco microclimates, and a printed or digital copy of confirmations. CTA: Use these seasonal tips to secure the cheapest economy flights from San Francisco International Airport (SFO) and streamline your trip.
Flight Times and Typical Schedules from San Francisco International Airport (SFO)
Flight times from San Francisco International Airport (SFO) vary by destination: Los Angeles (1h 20m), Seattle (2h), New York City (5h 30m nonstop), London (10–11h nonstop), and Tokyo (11–12h nonstop). Peak departure windows are early morning (5:00–9:00 a.m.) and evening (6:00–10:00 p.m.) local time, while mid-afternoon slots can offer lower fares and less crowded terminals. For cheapest economy, consider off-peak departure times and connecting schedules to reduce cost. CTA: Check flight schedules from San Francisco International Airport (SFO) for your target route and compare cheapest economy options.
How to Find Cheap Economy Flights from San Francisco International Airport (SFO)
Finding cheap economy flights from San Francisco International Airport (SFO) requires flexible dates, multi-airport searches, and early fare alerts. Use negotiation tactics like comparing connecting vs. nonstop itineraries, booking during shoulder months (September, January), and subscribing to airline and aggregator newsletters for flash sales. Include targeted searches for "cheap economy San Francisco to [destination]" and use price prediction tools to time purchases. CTA: Start a price alert for San Francisco International Airport (SFO) cheap economy flights and compare offers across carriers.