Translink 300 is the default city link; mLink lists adult single £8 / monthly return £11.

Belfast International sits in the countryside at Aldergrove with no station under the terminal. The airport bus page points to Translink Airport Express 300 seven days a week, every ~15 minutes at Monday–Friday peaks, ending at Belfast Grand Central Station (city-centre rail/bus hub). Translink’s mLink ticket-types page lists Airport Express 300 adult single £8.00 / child £4.00 and adult monthly return £11.00 / child £5.50 — confirm live in the journey planner or mLink before travel. Buy at Grand Central / airport TVMs, mLink, or from the driver where offered. Ulsterbus 109A covers Lisburn Rail Station and Antrim Buscentre; the £2.20 Airlink add-on is only for rail passengers from the listed northern stations onto 109A. Aircoach 705X is the direct coach toward Derry~Londonderry (not Christmas Day) from the coach park behind the taxi rank. Official taxis (Belfast Airport Taxis) rank outside the right-hand arrivals door 24/7; sample fares are posted in the exit hall — treat third-party “£25–£40 to centre” figures as orientation only and read the posted card.

Gen-3 Security Hall; Premium Security is the paid dedicated lane (book online).

Airport Hand Luggage guidance: with the new scanners you may leave liquids up to 2 litres and electronics in the cabin bag, and you no longer need a clear plastics bag. Destination airports may still enforce 100 ml on the return — pack for the stricter end of the trip. Premium Security is the airport’s paid dedicated lane: book online up to five minutes before entry; staff check boarding pass + Premium Security ticket; children under two free with a fare-paying adult. Live prices are set in the booking cart (third-party guides often quote from about £5 — trust the cart, not a blog). Aim to arrive about two hours before departure on busy easyJet / Jet2 / Ryanair banks.

Sole lounge; PP / paid / DragonPass paths; max stay typically 2 hours on PP.

After security, turn left through Duty Free and follow signs for gates 16–17 — Causeway Lounge sits beside those gates. Airport page: Mon–Fri and Sunday 05:00–20:00, Saturday 05:00–18:00; pre-book advised, walk-ups taken when space allows. Priority Pass mirrors those hours, notes closed 25 Dec, maximum two-hour stay, digital cards accepted, smart casual with no sportswear, children under two free, and typically two complimentary alcoholic drinks per adult (airport buffet copy also stresses a two-drink alcohol allocation). Self-serve snacks, tea/coffee, soft drinks, Wi-Fi, power, TVs, apron views. Paid day-pass prices move with the booking channel (resellers often show ~£25–£37) — check the airport booking flow or your lounge network app rather than assuming a fixed walk-up rate.

Airport table lists £5 / 0–10 min, £8 / 10–20, £13 / 20–60 — confirm barrier tariffs.

The Pick Up & Drop Off page places the drop-off zone opposite the terminal with payment at the coin/card machine on exit and a ban on leaving cars unattended. Published gate-rate bands on that page: £5.00 for 0–10 minutes, £8.00 for 10–20 minutes, £13.00 for 20–60 minutes, then a higher over-one-hour step — read the live barrier board because longer-stay figures are easy to mis-copy from secondary sites. Use Short Stay / Main / Premium / Long Stay products when you need to park and walk in; book official parking online for the better prepaid rates.