Bus 188orPrivate transfer to Modlin Airport from Chopin?

The short answer

For one traveler the Bus 188 is cheaper by up to PLN 334.60. The Private transfer to Modlin Airport from Chopin fare is sold "from" a price rather than at it, so this comparison holds only at the advertised prices and the real answer can change with the day you travel.

The Bus 188 is quicker: 21 min against 1 h.

Bus 188: 04:43–23:48. Private transfer to Modlin Airport from Chopin: hours not recorded.

Priced against each other

Whole-party totals · adult fares

What each costs for the whole party, in PLN. The cheaper of the two is marked on every row. The Private transfer to Modlin Airport from Chopin is charged in euros; its column is converted at the reference rate in its fare note.
Travelers	Bus 188	Private transfer to Modlin Airport from Chopin	Difference
1	PLN 4.40	from PLN 339	up to PLN 334.60
2	PLN 8.80	from PLN 339	up to PLN 330.20
3	PLN 13.20	from PLN 339	up to PLN 325.80
4	PLN 17.60	from PLN 339	up to PLN 321.40
5	PLN 22	from PLN 678	up to PLN 656
6	PLN 26.40	from PLN 678	up to PLN 651.60
7	PLN 30.80	from PLN 678	up to PLN 647.20
8	PLN 35.20	from PLN 678	up to PLN 642.80

Side by side

Where each one leaves you

188 · Warszawski Transport Publiczny (ZTM)Bus 188

From: Stop "Lotnisko Chopina – Przyloty 02" on the arrivals level
To: Metro Politechnika in about 21 minutes, then over the Łazienkowski bridge to Praga-Południe and PKP Gocławek
Luggage: Free and unlimited by the tariff; a city bus with no hold.
Runs: 04:43–23:48
Journey: 19–26 min

For Centralna, Centrum or the Old Town take the 175 or the train; the 188 goes east across the river instead.

The PLN 4.40 ticket covers the change to the metro at Politechnika inside its 75 minutes.

Bus 188: price for every party size

WTP's airport page

transfer · KiwitaxiPrivate transfer to Modlin Airport from Chopin

From: Driver meets you in arrivals with a name board
To: Modlin Airport, the terminal you name when you book
Luggage: Choose the vehicle by luggage as well as seats; the sedan seats four, the minibus seven.
Journey: 60 min

Book at least 16 hours ahead; nearer the day a car is offered only when one is free.

The price is fixed when you book, not by the meter.

Private transfer to Modlin Airport from Chopin: price for every party size

Book transfer through Kiwitaxi

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This compares two of 7 options. See all of them ranked for your party size

Bus 188orPrivate transfer to Modlin Airport from Chopin?

Priced against each other

Side by side

The other comparisons at Chopin Airport