EVA Air: Taiwan-based carrier known for strong service, premium economy and business-class product, and direct SFO–TPE nonstops in September. Good for those prioritizing comfort and on-time performance. China Airlines: Another Taiwan flag carrier offering nonstop services with competitive pricing and solid inflight meals; often matches EVA Air on schedule frequency. United Airlines: Offers nonstop and codeshare options; useful for combining U.S. domestic legs to SFO with transpacific flights and earning/using MileagePlus miles. One-stop carriers (ANA, JAL, Cathay Pacific): Provide alternative routings via Tokyo or Hong Kong with high service standards—often cheaper but longer. When comparing, consider seat comfort, baggage allowances, change/cancellation policies, and loyalty program benefits. CTA: Compare SFO to TPE flights across airlines to find the right balance of price, schedule, and onboard comfort for your September trip.