| Ranking | time | | Ht | L |
| 1. Netherlands |  Maaike de Waard 1:01.08s Arno Kamminga 59.06s Joeri Verlinden 51.78s Ranomi Kromowidjojo 53.42s | 3:45.34 | Q | 1 | 8 |
| 2. Germany |  Jenny Mensing 1:00.41s Fabian Schwingenschlögl 59.84s Marius Kusch 51.69s Annika Bruhn 54.28s | 3:46.22 | Q | 1 | 3 |
| 3. Russia |  Grigoriy Tarasevich 53.22s Ilya Khomenko 59.57s Viktoriya Andreeva 59.68s Maria Kameneva 53.98s | 3:46.45 | Q | 1 | 4 |
| 4. Great Britain |  Nicholas Pyle 54.50s Adam Peaty 58.49s Charlotte Atkinson 59.90s Freya Anderson 54.55s | 3:47.44 | Q | 2 | 1 |
| 5. Italy |  Matteo Restivo 55.14 s Arianna Castiglioni 1:06.32s Elena Di Liddo 57.76s Luca Dotto 48.51s | 3:47.73 | Q | 2 | 6 |
| 6. Poland |  Kacper Stokowski 55.21s Marcin Stolarski 1:00.40s Anna Dowgiert 59.47s Katarzyna Wasick 54.43s | 3:49.51 | Q | 2 | 5 |
| 7. Sweden |  Gustav Hökfelt 55.43s Johannes Skagius 1:00.26s Louise Hansson 57.95s Magdalena Kuras 55.94s | 3:49.58 | Q | 1 | 6 |
| 8. Switzerland |  Thierry Bollin 55.37s Yannick Käser 1:00.43s Svenja Stoffel 1:00.01s Maria Ugolkova 54.05s | 3:49.86 | Q | 1 | 5 |
| 9. Israel |  David Gamburg 55.71s Itay Goldfaden 1:02.18s Amit Ivry 58.77s Andrea Murez 54.23s | 3:50.89 | | 1 | 7 |
| 10.Belgium |  Emmanuel Vanluchene 56.32s Basten Caerts 1:00.32s Kimberly Buys 58.39s Juliette Dumont 56.19s | 3:51.22 | | 2 | 2 |
| 11.Lithuania |  Gytis Stankevičius 55.10s Kotryna Teterevkova 1:08.74s Deividas Margevičius 52.41s Rūta Meilutytė 55.60s | 3:51.85 | | 2 | 3 |
| 12.Belarus |  Mikita Tsmyh 55.14s Ilya Shymanovich 59.15s Anastasiya Kuliashova 1:00.73s Yuliya Khitraya 57.13s | 3:52.15 | | 2 | 8 |
| 13.Estonia |  Karl Johann Luht 55.88s Maria Romanjuk 1:09.51s Daniel Zaitsev 53.11s Kertu Ly Alnek 56.40s | 3:54.90 | | 2 | 7 |
| 14.Austria |  Bernhard Reitshammer 55.47s Christopher Rothbauer 1:01.76s Claudia Hufnagl 1:02.07s Lena Kreundl 55.70s | 3:55.00 | | 1 | 1 |
| 15.Turkey |  Metin Aydın 55.85s Berkay Ömer Öğretir 1:01.51s Nida Eliz Üstündağ 1:02.20s Selen Özbilen 56.11s | 3:55.67 | | 1 | 0 |
| 16.Latvia |  Ģirts Feldbergs 55.96s Daniils Bobrovs 1:01.62s Gabriela Ņikitina 1:05.45s Ieva Maļuka 56.01s | 3:59.04 | | 2 | 4 |
| 17.Slovakia |  Adam Černek 58.20s Tomáš Klobučník 1:00.82s Andrea Podmaníková 1:03.37s Laura Benková 57.34s | 3:59.73 | | 1 | 2 |
| -. Hungary |  Gábor Balog 54.59s Anna Sztankovics 1:08.46s Evelyn Verrasztó 1:00.41s Dominik Kozma | DSQ | | 2 | 0 |
index Glasgow 2018