Best way to travel between

Porto
Rennes
Travel Modes
Price
Distance
Duration
CO2
bus
$52.0
1957.63 km
19h 41mins
58.73 kgs
 
train
$91.91
2101.72 km
20h 29mins
111.39 kgs
 
flight
$93.12
957.86 km
5h 2mins
103.45 kgs
 
drive
$202.86
1452.87 km
13h 45mins
185.97 kgs
 
Tranport Distance Time(hrs) Cost(local) Cost(usd)
Bus 1957.63 km 19h 41mins 38 EUR 52.0
Train 2101.72 km 20h 29mins 68 EUR 91.91
Flight 957.86 km 5h 2mins 69 EUR 93.12
Drive 1452.87 km 13h 45mins 149 EUR 202.86
Take Bus from Porto to Bayonne
Time: 13h 2mins Cost: 37 EUR; $ 45.0 - 55.0 USD CO2 Emission: 25.84 kgs
Take Train from Bayonne to Paris Montparnasse Hall 1 - 2
Time: 4h 4mins Cost: 88 EUR; $ 108.0 - 132.0 USD CO2 Emission: 38.9 kgs
Take Train from Paris Montparnasse Hall 1 - 2 to Rennes
Time: 1h 54mins Cost: 44 EUR; $ 54.0 - 66.0 USD CO2 Emission: 19.21 kgs
Source: Rome2rio

Mode of travel comparision chart

The best and cheapest way to get from Porto and Rennes is to travel by bus, which will cost about 38 EUR or 46.80 USD.