Bus 100E and metro M4orPre-booked private transfer?

The short answer

These do not go to the same place, so price is not the comparison. The Pre-booked private transfer reaches Deak Ferenc ter, where three metro lines meet; the Bus 100E and metro M4 does not. This chain ends at Keleti palyaudvar, Budapest's other mainline station, not Deak Ferenc ter. For Deak Ferenc ter, ride the 100E through to its own terminus, or take the cheaper 200E and M3.

Both are listed at 35 min.

Bus 100E and metro M4: 04:36–00:56. Pre-booked private transfer: Runs all night.

Priced against each other

Whole-party totals · adult fares

What each costs for the whole party, in HUF. The cheaper of the two is marked on every row.
Travelers	Bus 100E and metro M4	Pre-booked private transfer	Difference
1	HUF 3,000	HUF 12,792	HUF 9,792
2	HUF 6,000	HUF 12,792	HUF 6,792
3	HUF 9,000	HUF 12,792	HUF 3,792
4	HUF 12,000	HUF 12,792	HUF 792
5	HUF 15,000	HUF 21,932	HUF 6,932
6	HUF 18,000	HUF 21,932	HUF 3,932
7	HUF 21,000	HUF 21,932	HUF 932
8	HUF 24,000	HUF 21,932	HUF 2,068

The cheaper option changes at 8 travelers, from the Bus 100E and metro M4 to the Pre-booked private transfer. That is the whole reason this comparison is not a single number.

Side by side

Where each one leaves you

100EM4 · BKKBus 100E and metro M4

From: Outside Terminal 2
To: Keleti palyaudvar, via Kalvin ter and a change to the M4
Luggage: A dedicated airport bus, then an ordinary metro carriage with no racks.
Runs: 04:36–00:56
Journey: 28–55 min

Buy two tickets: the 2,500 Ft airport single for the 100E, then a separate 500 Ft single for the M4 at Kalvin ter. The airport ticket does not cover a transfer.

Kalvin ter to Keleti palyaudvar is three stops on the M4 — Rakoczi ter, II. Janos Pal papa ter, then Keleti — about four minutes.

The M4 stops overnight, roughly 00:56 to 04:36. The 100E keeps running to Kalvin ter regardless, but nothing continues to Keleti in that window.

For Deak Ferenc ter itself, stay on the 100E to its own terminus rather than changing at Kalvin ter.

Bus 100E and metro M4: price for every party size

See the BKK airport ticket

transfer · Welcome PickupsPre-booked private transfer

From: Driver meets you in arrivals with a name board
To: Any address
Luggage: Stated when booking; choose the vehicle by luggage as well as seats.
Runs: All night
Journey: 35 min

This price is indicative: the operator sets it, and it moves with vehicle size, luggage and the exact address. Confirm the total at the time you book.

Pre-booked private transfer: price for every party size

Book transfer through Welcome Pickups

Partner link

This compares two of 4 options. See all of them ranked for your party size

Bus 100E and metro M4orPre-booked private transfer?

Priced against each other

Side by side

The other comparisons at Ferenc Liszt