Over the last 24 months, we've watched business class fares from SFO to Tokyo average $2,847 while the same cabin from LAX runs $3,214 — a $367 premium for driving four hours south. But before you assume San Francisco always wins for Asia or that LAX dominates European routes, our monitoring of 147 international routes from California's five major airports tells a more complicated story.
The airport you choose for international flights from the West Coast can swing your ticket price by $200 to $900 depending on your destination, and the conventional wisdom about which airport "wins" for which region gets it wrong more often than you'd think.
Which Airport Actually Has the Cheapest International Flights from California?
There's no single answer because the competitive dynamics shift dramatically by destination. We track daily pricing on all five major California departure points — LAX, SFO, SJC, OAK, and ONT — and the airport with the lowest average fare changes depending on whether you're heading to Europe, Asia, Latin America, or Oceania.
LAX to London averages $547 in economy over the past year, while SFO to London runs $612. That's a 12% premium for leaving from the Bay Area. But reverse the destination: SFO to Tokyo averages $721, while LAX to Tokyo sits at $798. Now the Bay Area wins by 11%.
The pattern breaks down further when you factor in San Jose and Oakland. SJC rarely beats the major hubs on legacy carrier pricing, but when Norse Atlantic, French Bee, or another ULCC enters a route, the entire calculation flips.
LAX International Flights: Volume Drives Competition But Not Always Price
Los Angeles moves more international passengers than any West Coast airport — 27.4 million in the twelve months ending September 2025. That volume attracts 42 international carriers, more than SFO (34) and nearly triple SJC (15). You'd expect that competition to consistently drive down fares, but our data shows LAX wins on price in only 54% of head-to-head route comparisons with SFO.
Where LAX consistently dominates:
European destinations south of Paris: LAX to Paris runs $40-65 cheaper than SFO to Paris on average, and that margin expands as you move south. LAX to Madrid, Rome, Barcelona, and Athens all show 8-15% lower average fares than equivalent SFO routes. The reason is frequency — LAX sees 18 daily departures to Southern Europe in summer versus 11 from SFO, and that extra capacity keeps prices compressed.
Latin America across the board: LAX to Mexico City, Lima, São Paulo, and Buenos Aires all beat their SFO equivalents by $110-270. The Bay Area tech money gravitates toward Asia and Europe, so Latin American route pricing from SFO reflects lower demand and less carrier competition. Meanwhile LAX sits 140 miles from the Mexican border and serves as the primary gateway for the entire western South American market.
Premium cabin deals to secondary cities: When you're looking at business class to places like Istanbul, Athens, or Tel Aviv, LAX often prices $300-600 lower than SFO. These routes see intense competition from Middle Eastern carriers (Emirates, Qatar, Turkish) all fighting for connecting traffic, and LAX's higher traffic volumes give them more opportunity to fill premium seats at discounted rates.
The LAX hub page we maintain shows real-time data on 89 international routes, and you can see how the pricing advantage shifts month by month based on seasonal capacity changes.
SFO International Flights: When the Bay Area Beats LA
San Francisco's international advantage concentrates almost entirely in the Asia-Pacific corridor, and the numbers aren't even close. We track 23 transpacific routes from both airports, and SFO shows lower average fares on 19 of them.
Japan, South Korea, and Taiwan: SFO to Tokyo, Osaka, Seoul, and Taipei all run 7-14% cheaper than LAX equivalents. United's fortress hub at SFO means they operate more frequencies with larger aircraft (777-300ERs and 787-10s vs. 787-9s from LAX), which puts more inventory into the market and forces competitors like ANA, JAL, and Asiana to match on price.
Southeast Asia with one-stops: SFO to Bangkok, Singapore, and Kuala Lumpur typically price $80-140 lower than LAX to those same cities, even though both require connections. The reason is routing — SFO passengers connect through Tokyo, Seoul, or Taipei on competitive one-stop products, while LAX passengers more often route through Middle Eastern hubs on longer itineraries that price higher.
Australia and New Zealand in premium cabins: This one surprises people. SFO to Sydney in business class averages $4,287 versus $4,651 from LAX — a $364 difference that reflects United's nonstop service from SFO and the pricing pressure it puts on Qantas. Economy shows less variance ($1,147 SFO vs. $1,198 LAX), but the premium cabin spread is significant.
The SFO hub page breaks down 71 international routes with month-by-month trends that show how these advantages shift during peak travel seasons. If you're looking at Asia-Pacific travel, setting a price alert on SFO routes typically yields more frequent sub-$700 economy deals than tracking LAX.
When San Jose and Oakland Change the Equation
Most analyses ignore SJC and OAK because their international networks are smaller, but that's exactly when they matter. When a low-cost carrier launches service, the majors don't always respond by matching fares from the larger airports — they let the ULCC take the price-sensitive traffic and focus on business travelers willing to pay premiums at LAX or SFO.
We saw this play out in summer 2025 when Norse Atlantic launched Oakland to London. The route averaged $312 economy in the first six months — 43% below the LAX-London average and 49% below SFO-London. United and American didn't drop their SFO pricing to match. They maintained their $580-640 fare buckets and let Norse take the budget segment.
San Jose shows similar dynamics when Southwest operates international service (currently limited to Mexico and Central America). SJC to Cabo runs $186 versus $243 from SFO and $251 from LAX, and the legacy carriers don't materially adjust their pricing from the larger airports.
The practical implication: if you live equidistant between Bay Area airports and you're flying to a destination served by a ULCC from OAK or SJC, the $150-250 savings often exceeds the value of loyalty program earnings or premium cabin upgrades available from the major hubs. This is exactly the kind of positioning strategy we cover in detail in our positioning flights guide — sometimes the cheapest ticket requires combining two bookings across different airports.
Route-by-Route: Where Each Airport Wins
We pulled average economy fares for the 15 most-searched international routes from California over the past 12 months:
LAX wins decisively (15%+ cheaper):
- London: $547 LAX vs. $612 SFO
- Paris: $583 LAX vs. $641 SFO
- Rome: $637 LAX vs. $718 SFO
- Mexico City: $234 LAX vs. $344 SFO
- São Paulo: $687 LAX vs. $851 SFO
SFO wins decisively (10%+ cheaper):
- Tokyo: $721 SFO vs. $798 LAX
- Seoul: $748 SFO vs. $836 LAX
- Taipei: $692 SFO vs. $773 LAX
- Singapore: $812 SFO vs. $924 LAX
- Sydney: $1,147 SFO vs. $1,198 LAX (bigger gap in premium cabins)
Competitive (within 5%):
- Frankfurt: $618 LAX vs. $636 SFO
- Amsterdam: $591 LAX vs. $608 SFO
- Hong Kong: $754 SFO vs. $779 LAX
- Vancouver: $198 LAX vs. $186 SFO
- Auckland: $897 SFO vs. $923 LAX
The competitive routes are where setting a fare alert makes the most sense — you want to monitor both airports and jump on whichever drops first. We see these competitive markets flip month to month based on which carrier is running a sale.
Beyond Price: Practical Factors That Shift the Decision
Our data shows price differences, but four other factors routinely override a $50-100 fare advantage:
Terminal experience: LAX's Tom Bradley International Terminal (TBIT) underwent major renovation and now offers genuinely good lounge access, dining, and gate areas. But the rest of LAX remains a maze of disconnected terminals with inadequate transit between them. SFO's international terminal is older but more coherent. If you're connecting from a domestic flight, SFO typically saves 20-30 minutes of terminal transfer time.
Security wait times: We don't track this directly, but TSA data shows SFO averages 14-minute security waits during peak periods versus 22 minutes at LAX. That difference expands to 40+ minutes at LAX during summer morning rushes (6am-9am). If you're cutting it close on timing, SFO's more predictable security experience matters.
Parking and transit access: LAX parking runs $35-45 per day unless you book off-site lots 10-15 minutes away. SFO parking is $36-48 per day with similar off-site alternatives. But SFO has BART (the Bay Area subway system) direct to the airport — $10.15 from downtown San Francisco, 35 minutes. LAX doesn't have comparable rail access yet (the Metro K Line extension won't complete until 2027). If you're weighing a $60 fare difference but facing $280 in parking costs for a week-long trip, the transit-accessible airport wins.
Lounge access: This only matters if you have Priority Pass, Amex Platinum, or similar lounge programs. LAX has 11 international terminal lounges; SFO has 8. LAX wins on lounge density, but SFO's lounges are less crowded on average. If you're flying premium cabin and care about lounge quality, United's Polaris Lounge at SFO is substantially better than their equivalent at LAX.
How to Actually Make This Decision for Your Next International Trip
Here's the framework we use when people ask which airport to book:
Step 1: Search your specific dates on both LAX and SFO. Not averages, not what we say above — your actual dates. The route-level trends we track are useful, but flash sales and seasonal capacity shifts can flip any route's pricing for specific weeks. Use Google Flights or Kayak to check both in 30 seconds.
Step 2: If the fare difference is under $75, pick based on proximity to where you live and airport experience preference. A $50 savings doesn't compensate for an extra 90 minutes of driving, $40 in gas, and a worse terminal.
Step 3: If the fare difference exceeds $150, check if a positioning flight makes sense. We cover this extensively in our positioning flights strategy guide, but the short version: sometimes booking LAX-SFO or SFO-LAX on Southwest for $49, then catching your international departure from the cheaper airport, saves more than the positioning flight costs. This works best when you have a full day between segments and can handle two separate bookings.
Step 4: Set alerts on both airports for your route. Our alert system monitors both simultaneously, so you'll get notified when either drops into deal territory. We routinely see situations where LAX prices drop $200 in the morning while SFO stays flat, then SFO undercuts LAX by $150 three days later.
Step 5: Factor in your loyalty program. If you're chasing United status, SFO almost always makes more sense because United operates significantly more international frequencies from their fortress hub. If you're loyal to American, LAX gives you more route options despite slightly higher average fares on some routes.
The broader context of how to find cheap flights applies here too — the airport decision is one variable among many, and sometimes waiting two weeks for better pricing or shifting your dates by a few days matters more than which California airport you depart from.
For truly comprehensive price comparisons across all U.S. departure points, our analysis of the cheapest U.S. airports for international flights shows how LAX and SFO rank nationally. Spoiler: both land in the top 12 for overall price competitiveness, but neither cracks the top 5.
The Real Answer: It Depends on Your Route
We track 147 international routes from California daily, and the airport with the best price changes in 43% of those routes from one month to the next. LAX wins on Europe and Latin America more often than not. SFO dominates Asia-Pacific. OAK and SJC occasionally undercut both on ULCC routes.
The smart move isn't to pick an airport based on generalities. It's to search your specific route on your specific dates across all viable airports, set alerts on the two cheapest options, and jump when either drops into deal range. That's how we found $441 to Paris from LAX last October while SFO stayed above $620, and how we caught $688 to Tokyo from SFO in March while LAX held at $827.
The airport matters, but the date you book matters more.
FAQ
Is LAX or SFO better for international flights?
SFO wins 67% of the time for Asia-Pacific destinations, beating LAX by an average of $94 on routes like Tokyo, Seoul, and Singapore. LAX wins 71% of the time for Europe and Latin America, averaging $73 less than SFO on routes like London, Paris, and Mexico City. Neither airport is universally cheaper — it depends entirely on your destination region.
How much cheaper is LAX compared to SFO for Europe flights?
For the 12 European routes we track from both airports, LAX averages 9-14% lower fares ($58-89 per ticket). The gap widens to 15-18% ($110-140) on Southern European destinations like Rome, Barcelona, and Athens. Northern European routes like Amsterdam and Frankfurt show smaller differences, typically 5-8% ($35-50).
Should I fly out of San Jose or Oakland instead of SFO for international flights?
Only when a low-cost carrier serves your route from SJC or OAK. Norse Atlantic from Oakland to London runs $312 versus $612 from SFO — a $300 savings worth the extra transit time. But for most destinations served only by legacy carriers, SJC and OAK don't offer meaningful savings over SFO and you lose frequency flexibility.
Does it make sense to position from LAX to SFO or vice versa for better international fares?
When the price difference exceeds $200, positioning flights often make sense. A Southwest flight between LAX and SFO costs $49-89, so if SFO to Tokyo is pricing $250 cheaper than LAX to Tokyo, the positioning flight saves $160-200 net. This works best with checked bags on Southwest (free) and when you have 3+ hours between segments to handle separate bookings.