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St. Louis Lambert Intl: the template field, three parallels over the Mississippi. A steady shift to learn the board. Steady tier.

Spirit of St. Louis: St. Louis' business-aviation front door. Fractional jets, trainers, and transient GA share two close parallels beneath the Bravo. Busy tier.

St. Louis Regional: the metro's northeast corporate reliever. West Star maintenance jets and local GA share two long crossing runways beside the Mississippi. Steady tier.

Scott AFB / MidAmerica St. Louis: an Air Force mobility base and a civil terminal on one airfield. Tankers and transports share two far-spaced parallels with Allegiant, and now and then everything waits on a VIP movement. Busy tier.

St. Louis Downtown: the Mississippi-side business and training reliever. Corporate arrivals and a deep GA pattern share two close parallels and a short crosswind beneath the Bravo. Busy tier.

Kansas City Intl: a Southwest focus city on the Missouri River bluffs. Two long parallels and a crosswind, with the Center's own metro traffic. Busy tier.

Wichita Eisenhower National: the Air Capital's Class C approach seat. Regional airline banks over a heavy Textron and Spirit factory bizjet base, with two parallels and a crosswind. Steady tier.

Tulsa International: Green Country's Class C approach seat and American's world maintenance base. American-led regional banks over a corporate bizjet base, two parallels plus a crosswind, and the one published Tulsa arrival. Steady tier.

Springfield-Branson National: two equally busy runways cross at the Ozarks' regional gateway. Airline and cargo jets share the Class C with a deep GA and training stream. Steady tier.

Joplin Regional: SkyWest regional jets cross a GA-majority tower, with two equal-length crossing runways and no published route structure. Steady tier.

Branson: one precision runway cut into the Ozark hills, with resort-bound business traffic and GA but no current scheduled airline service. Steady tier.

Central Illinois Regional: regional jets, Allegiant leisure flights, FedEx cargo, and prairie GA share two crossing runways at Bloomington-Normal. Steady tier.

General Downing - Peoria International: Central Illinois' crossing-runway mix of regional jets, Allegiant, UPS, daily Guard Hercules traffic, and flight-school GA. Busy tier.

Waynesville-St. Robert Regional / Forney Field: Contour regional jets and Army traffic share one precision runway on the Fort Leonard Wood installation. Steady tier.

Rosecrans Memorial: a Missouri River Guard field where Hercules tactical training and municipal GA share a long primary and a short assault-strip crosswind. Busy tier.

Topeka Regional: Forbes Field's 12,800-foot primary carries Guard tankers and transient military traffic over a mixed civil and GA operation. Busy tier.

Salina Regional: daily regional jets share a former Air Force runway complex with military transients, corporate traffic and a deep university training pattern. Busy tier.

Philip Billard Municipal: Topeka's close-in municipal tower, where corporate arrivals and a deep GA pattern share two short crossing runways beside the Kansas River. Steady tier.

Manhattan Regional: daily American regional jets to Dallas and Chicago share a Kansas River tower with Fort Riley-adjacent GA and a short crosswind. Steady tier.

Hutchinson Regional: three crossing runways and a GA-heavy corporate board beside the Arkansas River, with Wichita Approach working the outside airspace. Steady tier.

Garden City Regional: two daily American departures share two crossing runways with western Kansas GA, corporate, cargo and military traffic. Steady tier.

Beech Factory: Beechcraft factory flying, corporate jets and extensive training share one long runway beneath Wichita Approach. Steady tier.

Tulsa Riverside: Tulsa's busy GA reliever, with trainers and corporate jets working close parallels and a short crosswind runway. Busy tier.

Stillwater Regional: Oklahoma State training traffic and regional airline service share a long ILS runway with a crossing strip. Steady tier.

Enid Woodring Regional: Vance military training dominates a long ILS runway, with civil GA and a short crosswind strip underneath. Busy tier.

Southern Illinois: Southern Illinois' high-training tower. Student pattern work and business GA share three intersecting runways beside the Mississippi corridor. Steady tier.

Veterans Airport of Southern Illinois: Southern Illinois' commercial gateway. Contour regional jets to Chicago share crossing runways with local and business GA. Steady tier.

Kansas City Downtown: downtown Kansas City's bizjet front door, on a peninsula inside a Missouri River bend. Fractional jets and GA share crossing runways under the metro's satellite arrivals. Steady tier.

Johnson County Executive: the metro's training strip, a single 4,097 ft runway on the Johnson County upland. Pattern work all day with a light-jet sliver, the gentlest seat in the KC trio. Steady tier.

New Century AirCenter: the old Olathe naval air station, now the metro's southwest reliever. Training and transient GA on the crossing runways, bizjets on the 7,339 ft strip. Steady tier.

Columbia Regional: mid-Missouri contract tower. GA majority with a few daily regional jets to sequence in. Steady tier.

Jefferson City Memorial: a contract tower on the Missouri River. GA, bizjets, and a busy pattern; the runway is always yours. Steady tier.

Abraham Lincoln Capital: central-Illinois level-4 tower. Eagle RJs, Allegiant and Breeze over a prairie of GA and pattern traffic. Steady tier.

Indianapolis International: two long parallels carry a broad airline mix while the country's second-largest FedEx hub builds cargo banks beside them. Heavy tier.

Louisville Muhammad Ali International: UPS Worldport freight banks and airline traffic share two parallels beside the Ohio, with Guard Hercules traffic mixed in. Heavy tier.

Cincinnati/Northern Kentucky International: three north-south parallels and a crosswind runway, with passenger banks threaded through Amazon and DHL cargo waves. Heavy tier.

John Glenn Columbus International: two east-west parallels carry a broad airline mix, regional jets, cargo and Ohio business traffic. Busy tier.

James M. Cox Dayton International: a three-runway Class C tower mixing regional airlines, Allegiant leisure traffic, cargo, and southwest Ohio GA. Steady tier.

Anderson Regional: a high-training Indiana GA tower where charter and business traffic share a primary ILS runway and short crosswind. Steady tier.

Columbus Municipal: a former Air Force field where corporate traffic, trainers and transient GA share two long crossing runways. Steady tier.

Evansville Regional: the Tri-State's Class C gateway, with regional jets, Florida leisure flights and GA sharing a long primary beside the Ohio River. Steady tier.

Tri-State/Milton J. Ferguson Field: one ridge-top runway mixes regional airline and Allegiant arrivals with Appalachian business and general aviation traffic. Steady tier.

Terre Haute Regional/Hulman Field: two long crossing runways carry university training, corporate and general aviation beneath a 24-hour approach facility. Busy tier.

Wilmington Air Park: Ohio's cargo-focused air park puts 767 freight and maintenance traffic onto one active precision runway beside a closed parallel. Busy tier.

Blue Grass: central Kentucky's Class C mixes regional airlines, Allegiant, horse-country business aviation and training. Busy tier.

Bowman Field: Louisville's close-in GA reliever, with trainers, business aircraft and two crossing strips beside the Ohio. Steady tier.

Cincinnati Municipal Airport/Lunken Field: Cincinnati's close-in GA field, where business jets and trainers work two crossing runways beneath the Class B. Steady tier.

Delaware County Regional Airport: Muncie's long calm-wind runway mixes training traffic, local GA and business aircraft without airline service. Steady tier.

Ohio State University Airport: university flight training, local GA and business aircraft share three strips northwest of Columbus. Steady tier.

Owensboro/Daviess County Regional Airport: Essential Air Service, military training and Kentucky GA share an 8,000-foot north-south runway and crossing pavement. Steady tier.

Mid-Ohio Valley Regional Airport: Essential Air Service and Appalachian GA share a long ILS runway, a displaced threshold and crossing pavement. Steady tier.

Bolton Field Airport: a single ILS runway west of Columbus mixes flight training, banner activity, local GA and business aircraft. Steady tier.

Rickenbacker International: long parallel runways where international freight, military lift and leisure traffic share the sequence. Busy tier.

West Virginia International Yeager: One hilltop runway, regional jets and leisure arrivals sharing the sequence. Steady tier.

Monroe County: A college-town tower: trainers in the pattern, business arrivals on the long runway. Steady tier.

Pittsburgh International: three long east-west parallels, a crosswind runway, military traffic and a deep airline mix under Pittsburgh's Class B. Heavy tier.

Detroit Metropolitan Wayne County: Delta banks across four north-south parallels, with outboard arrivals and inboard departures. Heavy tier.

Cleveland-Hopkins International: two long northeast-southwest parallels, a crossing runway and a varied passenger bank on the Lake Erie shore. Busy tier.

Cape Girardeau Regional: Contour regional jets share two crossing runways with a growing flight-school and GA pattern beside the Mississippi. Steady tier.

Springdale Municipal: Arkansas' busiest municipal airport, where flight-school patterns and business traffic share a single runway in the Ozarks. Busy tier.

Nashville International: Three parallel streams, Southwest turns and the occasional transatlantic heavy. Busy tier.

Fort Smith Regional: airline arrivals, business aviation and military training meet on a long instrument runway at the Arkansas-Oklahoma edge. Busy tier.

Drake Field: Northwest Arkansas business traffic and an expanding flight-school pattern share one runway in the Ozarks. Busy tier.

Greenville Mid-Delta: Regional service and local GA share close parallel runways in western Mississippi, but only the long primary accepts air-carrier operations. Steady tier.

Golden Triangle Regional: Delta and American regional jets share a long precision runway with Mississippi business and training traffic. Steady tier.

Greenwood-Leflore: western Mississippi GA and business traffic work two crossing runways at a former wartime training field. Steady tier.

Hawkins Field: Jackson's close-in general-aviation field works crossing runways beside the Pearl River under Jackson Approach. Steady tier.

Jackson-Medgar Wiley Evers International: Jackson's airline gateway works two equal-length parallel runways under its own Class C approach control. Busy tier.

Tupelo Regional: a contract tower where Contour's thin regional schedule shares one long runway with Mississippi GA. Steady tier.

Frederick W. Smith International/Memphis: FedEx heavies and passenger jets share three north-south parallels beside the Mississippi, with wake spacing setting the rhythm. Heavy tier.

Minneapolis-Saint Paul International: Delta's northern fortress, two parallel streams, and the 17/35 cross-flow make a cold-weather hub with real runway-use character. Heavy tier.

George Bush Intercontinental/Houston: United's Houston hub, with three east-west arrival runways and two diagonal departure runways in each published flow. Heavy tier.

Louis Armstrong New Orleans International: a long river-side 11/29 carries every movement during the 02/20 rehabilitation, with Gulf Coast airline traffic on one strip. Heavy tier.

San Francisco International: parallel arrivals over the bay, crossing departure banks and a United-Alaska hub under NorCal Approach. Heavy tier.

Sacramento International: two north-south parallels, a Southwest-heavy bank and a nighttime north-flow preference. Busy tier.

Oakland San Francisco Bay Airport: a 10,520-foot airline runway beside three shorter strips and a Southwest-heavy Bay Area bank. Busy tier.

Miami International: three east-west runways, a crossing 12/30, American's hub and a deep international cargo mix. Heavy tier.

Tampa International: two north-south parallels and a short crosswind runway put Tampa Bay's airline banks under one Class B scope. Heavy tier.

Fort Lauderdale/Hollywood International: two east-west parallels, Miami Approach and a reshaped airline mix on the Atlantic coast. Heavy tier.

Southwest Florida International: one 12,000-foot runway, vacation-market banks and a runway 24 nighttime noise preference. Busy tier.

Orlando International: four north-south runways and a preferred south flow make Orlando's visitor banks a parallel-stream challenge. Heavy tier.

Jacksonville International: crossing 08/26 and 14/32, mixed passenger and cargo traffic, and two directional flows. Busy tier.

Hartsfield-Jackson Atlanta Intl: five parallels, a Delta fortress, the world's busiest. Heavy flows all day. Heavy tier.

Charlotte Douglas International: American's second-largest hub, three parallel runways and freshly redesignated pavement under Charlotte Approach. Heavy tier.

Chicago O'Hare Intl: eight runways, six of them parallel, and two mega-hubs sharing one field. The most complex board in the game. Heavy tier.

Denver International: mile-high field, 16,000 ft of runway on the high plains. A busy six-runway hub. Heavy tier.

Seattle-Tacoma Intl: three parallels between Puget Sound and Lake Washington. A busy Alaska stronghold. Busy tier.

Portland International: two Columbia River parallels carry an Alaska-led airline mix, with real Portland arrivals and departures feeding both east and west flows. Busy tier.

Salt Lake City International: Delta's mountain hub with two long air-carrier parallels and a mixed-use eastern strip. Heavy tier.

Harry Reid Intl: two pairs of parallels crossing on the valley floor. A Southwest stronghold that lands and departs across itself. Heavy tier.

Los Angeles International: four parallel runways in two complexes, with Pacific arrivals and dense domestic and international traffic. Heavy tier.

San Diego International: one coastal runway, a preferred west flow and airline banks that must share the same pavement. Heavy tier.

Dallas Fort Worth International: seven runways and a dense American Airlines hub, with separate north and south flow banks. Heavy tier.

John F Kennedy International: four long runways in crossing pairs, with dense domestic feed and a global international arrival bank. Heavy tier.

Newark Liberty International: United's New York-area hub works parallel arrivals and departures beside a crossing strip. Heavy tier.

Philadelphia International: two long east-west parallels and crosswind pavement, with American's transatlantic gateway feeding the Northeast corridor. Heavy tier.

General Edward Lawrence Logan International: six crossing runways on the harbor, with JetBlue and Delta traffic feeding the northeast corridor and transatlantic flights. Heavy tier.

Phoenix Sky Harbor International: three east-west parallels, with American and Southwest banks crossing a Class B desert gateway. Heavy tier.

Baltimore/Washington International Thurgood Marshall: Southwest's Mid-Atlantic bank meets three intersecting runways, with 15L/33R reserved for emergency or mercy traffic. Heavy tier.

Washington Dulles International: Dulles: three long north-south parallels carry United's domestic and transatlantic banks through Potomac airspace. Heavy tier.

Raleigh-Durham International: long primary runway, shorter parallel and a small crosswind strip under Raleigh Approach. Busy tier.