What exactly does an EVABidDeal offer cover: one flight, one passenger or the whole booking?

What this answer depends on

• EVABidDeal for eligible EVA-issued, EVA-operated confirmed flights; no bid-price recommendation or acceptance guarantee
• An invitation does not mean every flight qualifies. Inspect the eligible sectors in the official form and multiply the per-passenger amount by the included travelers before submitting. Separate booking references are assessed separately; a successful offer on one reference does not carry another reference with it.
• The bid is a request for the next cabin, not a confirmed purchase of any cabin shown in marketing images. EVA says payment is taken only for a successful offer. Keep the offer confirmation and then look for the acceptance result; do not describe yourself as upgraded merely because the form accepted a bid.
• EVABidDeal lets travelers select eligible flights separately; each bid amount is per passenger and applies to all passengers in the booking.
• EVABidDeal is limited to the next higher cabin and closes 50 hours before each eligible departure.
• EVA directs selected-traveler-only bidders to EVA or the original agent to split the reservation first.
• EVABidDeal eligibility is flight-specific, separate booking references are assessed independently, and listed invalidating conditions include checked-in status before the offer window closes.
• EVA deducts payment only when the offer succeeds.