Time   Mile   Instruction   For   Toward
Summary:  88.4 miles (1 hour, 24 minutes)
06:30   0.0   Depart Birmingham Airport Tourist Info [Main Avenue, Birmingham International Airport, Birmingham, B26 3, United Kingdom, Tel: +44 121-7677145] on Main Avenue (East)   120 yds   
06:30   0.1   Bear LEFT (East) onto International Drive   87 yds   
06:31   0.1   Stay on International Drive (South)   98 yds   Long and Short Stay Parking / Car Hire Return
06:31   0.2   Continue (South) on Airport Way   65 yds   
06:32   0.2   Continue (South) on Local road(s)   0.2 mi   
06:33   0.4   At roundabout, take the FIRST exit   10 yds   
06:33   0.4   Exit roundabout onto Airport Way   0.2 mi   
06:34   0.6   At roundabout, take the FIRST exit   21 yds   
06:34   0.6   Exit roundabout onto Airport Way   109 yds   
06:34   0.7   At roundabout, take the SECOND exit   76 yds   
06:34   0.7   Exit roundabout onto Bickenhill Lane   0.1 mi   
06:34   0.9   At roundabout, take the THIRD exit   131 yds   
06:35   0.9   Exit roundabout onto Bickenhill Lane   0.1 mi   
06:35   1.1   At roundabout, take the FIRST exit   21 yds   
06:35   1.1   Exit roundabout onto Ramp   142 yds   
06:35   1.2   Bear LEFT (East) onto A45 [Coventry Road]   0.3 mi   
06:36   1.5   Bear LEFT (East) onto Ramp   0.1 mi   
06:36   1.7   At roundabout, take the SECOND exit   98 yds   
06:36   1.7   Exit roundabout onto Ramp   0.2 mi   M42 / M1 & M6 / M1 / The North / London / Lichfield / Tamworth
06:37   1.9   Continue (North) on M42   1.7 mi   
06:38   3.6   At M42 Exit 7, continue (North) on Ramp   0.6 mi   M6 / The North West / B'ham (E,N and Cent)
06:39   4.3   Continue (North-West) on M6   12.4 mi   
06:49   16.6   At M6 Exit 8, stay on M6 (West)   66.0 mi   M6 / M1 / M40 / London / Birmingham (N. E. and Cen) / N.E.C. and Airport
07:42   82.6   At M6 Exit 20, continue (North-West) on Ramp   0.2 mi   M56 / A50 / Runcorn / Airport B'head / N. Wales / Lymm and Warrington
07:42   82.8   Stay on Ramp (North-West)   0.8 mi   A50 / Lymm and Warrington
07:43   83.6   At roundabout, take the FIRST exit   43 yds   
07:43   83.6   Exit roundabout onto A50 [Cliff Lane]   0.2 mi   
07:43   83.8   At roundabout, take the SECOND exit   43 yds   
07:43   83.8   Exit roundabout onto A50 [Cliff Lane]   3.8 mi   
07:51   87.6   Continue (West) on A49 [Knutsford Road]   32 yds   
07:51   87.7   Bear RIGHT (North-West) onto Local road(s)   10 yds   
07:51   87.7   Bear RIGHT (North) onto Local road(s)   54 yds   
07:52   87.7   Turn LEFT (West) onto A5061 [Barbauld Street]   0.6 mi   
07:54   88.3   Turn RIGHT (East) onto Sankey Street   153 yds   
07:54   88.4   Arrive Warrington [Sankey Street, Warrington, WA1 1, United Kingdom]      
SUMMARY
Driving distance:  88.4 miles
Trip duration:  1 hour, 24 minutes
Driving time:  1 hour, 24 minutes
As you can see Auto Route Takes you M42/M6 but maybe you would consider the M6 Toll road as this is not too busy and unless you are in a 12 seater landy (they may class this as a bus) it will cost a pound or two.
You pays your money and takes you chioce, be aware that I believe some breakdown services will not rescue you off the toll road unless you pay there toll which could be £20 if a flat bed recovery is required.