LONDON, May 23 (Reuters) - Russian gas deliveries eastward through the Yamal-Europe pipeline rose on Monday morning while flows through two other key routes to Europe were stable.

Flows along the Yamal-Europe pipeline remained eastbound from Germany to Poland and rose to 11,779,490 kilowatt hours per hour (kWh/h) by 0730 GMT from 9,832,429 kWh/h at midnight, data from operator Gascade showed.

Flows on the Nord Stream 1 pipeline across the Baltic Sea to Germany were stable at 73,417,707 kWh/h.

Nominations for flows into Slovakia from Ukraine via the Velke Kapusany border point were at around 421 gigawatt hours per day, similar to the previous day, data from the Ukrainian transmission system operator showed.

Russian gas producer Gazprom said it continued to supply gas to Europe through Ukraine via the Sudzha entry point, with volumes on Monday seen at 43 million cubic metres (mcm), down from 44.7 mcm on Sunday. (Reporting by Nina Chestney, and Louise Heavens)